70397988 has 24 divisors (see below), whose sum is σ = 166514208. Its totient is φ = 23144256.

The previous prime is 70397981. The next prime is 70398001. The reversal of 70397988 is 88979307.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 70397988.

It is not an unprimeable number, because it can be changed into a prime (70397981) 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, 39306 + ... + 41057.

It is an arithmetic number, because the mean of its divisors is an integer number (6938092).

Almost surely, 2^70397988 is an apocalyptic number.

It is an amenable number.

70397988 is an abundant number, since it is smaller than the sum of its proper divisors (96116220).

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

70397988 is a wasteful number, since it uses less digits than its factorization.

70397988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80443 (or 80441 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 70397988 is about 8390.3508865839. The cubic root of 70397988 is about 412.9081125322.

The spelling of 70397988 in words is "seventy million, three hundred ninety-seven thousand, nine hundred eighty-eight".