70320656 has 40 divisors (see below), whose sum is σ = 156864960. Its totient is φ = 29913984.

The previous prime is 70320647. The next prime is 70320659. The reversal of 70320656 is 65602307.

It is not an unprimeable number, because it can be changed into a prime (70320659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13310 + ... + 17826.

It is an arithmetic number, because the mean of its divisors is an integer number (3921624).

Almost surely, 2^70320656 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 70320656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78432480).

70320656 is an abundant number, since it is smaller than the sum of its proper divisors (86544304).

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

70320656 is a wasteful number, since it uses less digits than its factorization.

70320656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4671 (or 4665 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 70320656 is about 8385.7412313999. The cubic root of 70320656 is about 412.7568643207.

The spelling of 70320656 in words is "seventy million, three hundred twenty thousand, six hundred fifty-six".