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70250040 = 23325761457
BaseRepresentation
bin1000010111111…
…10111000111000
311220012001221100
410023332320320
5120441000130
610545411400
71512054420
oct413767070
9156161840
1070250040
1136721993
121b639b60
1311728593
149489480
156279c60
hex42fee38

70250040 has 192 divisors, whose sum is σ = 265786560. Its totient is φ = 15759360.

The previous prime is 70250023. The next prime is 70250057. The reversal of 70250040 is 4005207.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (70250023) and next prime (70250057).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 70249995 and 70250022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 153492 + ... + 153948.

It is an arithmetic number, because the mean of its divisors is an integer number (1384305).

Almost surely, 270250040 is an apocalyptic number.

70250040 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70250040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132893280).

70250040 is an abundant number, since it is smaller than the sum of its proper divisors (195536520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70250040 is a wasteful number, since it uses less digits than its factorization.

70250040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 70250040 is about 8381.5296933197. The cubic root of 70250040 is about 412.6186545713.

Adding to 70250040 its reverse (4005207), we get a palindrome (74255247).

The spelling of 70250040 in words is "seventy million, two hundred fifty thousand, forty".