70781040 has 240 divisors, whose sum is σ = 269732736. Its totient is φ = 17107200.

The previous prime is 70781017. The next prime is 70781041. The reversal of 70781040 is 4018707.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 70780995 and 70781013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70781041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 213675 + ... + 214005.

Almost surely, 2^70781040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70781040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134866368).

70781040 is an abundant number, since it is smaller than the sum of its proper divisors (198951696).

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

70781040 is a wasteful number, since it uses less digits than its factorization.

70781040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 70781040 is about 8413.1468547744. The cubic root of 70781040 is about 413.6556683236.

Adding to 70781040 its reverse (4018707), we get a palindrome (74799747).

It can be divided in two parts, 7078 and 1040, that added together give a palindrome (8118).

The spelling of 70781040 in words is "seventy million, seven hundred eighty-one thousand, forty".