697749256 has 64 divisors (see below), whose sum is σ = 1378615680. Its totient is φ = 330739200.

The previous prime is 697749253. The next prime is 697749277. The reversal of 697749256 is 652947796.

Its product of digits (5715360) is a multiple of the sum of its prime divisors (490).

It is a junction number, because it is equal to n+sod(n) for n = 697749197 and 697749206.

It is not an unprimeable number, because it can be changed into a prime (697749253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2994516 + ... + 2994748.

It is an arithmetic number, because the mean of its divisors is an integer number (21540870).

Almost surely, 2^697749256 is an apocalyptic number.

It is an amenable number.

697749256 is a deficient number, since it is larger than the sum of its proper divisors (680866424).

697749256 is a wasteful number, since it uses less digits than its factorization.

697749256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494 (or 490 counting only the distinct ones).

The product of its digits is 5715360, while the sum is 55.

The square root of 697749256 is about 26414.9438008109. The cubic root of 697749256 is about 886.9513396771.

The spelling of 697749256 in words is "six hundred ninety-seven million, seven hundred forty-nine thousand, two hundred fifty-six".