697648056 has 128 divisors (see below), whose sum is σ = 2080296960. Its totient is φ = 190771200.

The previous prime is 697648013. The next prime is 697648067. The reversal of 697648056 is 650846796.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 504486 + ... + 505866.

It is an arithmetic number, because the mean of its divisors is an integer number (16252320).

Almost surely, 2^697648056 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 697648056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1040148480).

697648056 is an abundant number, since it is smaller than the sum of its proper divisors (1382648904).

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

697648056 is a wasteful number, since it uses less digits than its factorization.

697648056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525 (or 1521 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The square root of 697648056 is about 26413.0281490025. The cubic root of 697648056 is about 886.9084571208.

The spelling of 697648056 in words is "six hundred ninety-seven million, six hundred forty-eight thousand, fifty-six".