697446640 has 40 divisors (see below), whose sum is σ = 1768980528. Its totient is φ = 253616640.

The previous prime is 697446619. The next prime is 697446653. The reversal of 697446640 is 46644796.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395397 + ... + 397156.

Almost surely, 2^697446640 is an apocalyptic number.

It is an amenable number.

697446640 is an abundant number, since it is smaller than the sum of its proper divisors (1071533888).

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

697446640 is a wasteful number, since it uses less digits than its factorization.

697446640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792577 (or 792571 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 46.

The square root of 697446640 is about 26409.2150583845. The cubic root of 697446640 is about 886.8230966269.

The spelling of 697446640 in words is "six hundred ninety-seven million, four hundred forty-six thousand, six hundred forty".