70712640 has 168 divisors, whose sum is σ = 249314208. Its totient is φ = 18385920.

The previous prime is 70712627. The next prime is 70712669. The reversal of 70712640 is 4621707.

70712640 is a `hidden beast` number, since 7 + 0 + 7 + 12 + 640 = 666.

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 23 ways as a sum of consecutive naturals, for example, 123555 + ... + 124125.

Almost surely, 2^70712640 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 70712640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124657104).

70712640 is an abundant number, since it is smaller than the sum of its proper divisors (178601568).

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

70712640 is a wasteful number, since it uses less digits than its factorization.

70712640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 70712640 is about 8409.0808058907. The cubic root of 70712640 is about 413.5223785485.

The spelling of 70712640 in words is "seventy million, seven hundred twelve thousand, six hundred forty".