70071540 has 192 divisors, whose sum is σ = 253532160. Its totient is φ = 14031360.

The previous prime is 70071517. The next prime is 70071557. The reversal of 70071540 is 4517007.

It is a self number, because there is not a number n which added to its sum of digits gives 70071540.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 133719 + ... + 134241.

It is an arithmetic number, because the mean of its divisors is an integer number (1320480).

Almost surely, 2^70071540 is an apocalyptic number.

70071540 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 70071540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126766080).

70071540 is an abundant number, since it is smaller than the sum of its proper divisors (183460620).

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

70071540 is a wasteful number, since it uses less digits than its factorization.

70071540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582 (or 580 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 70071540 is about 8370.8745062867. The cubic root of 70071540 is about 412.2688806315.

Adding to 70071540 its reverse (4517007), we get a palindrome (74588547).

The spelling of 70071540 in words is "seventy million, seventy-one thousand, five hundred forty".