697649028 has 48 divisors (see below), whose sum is σ = 1688613696. Its totient is φ = 224017920.

The previous prime is 697648999. The next prime is 697649039. The reversal of 697649028 is 820946796.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28408 + ... + 46928.

It is an arithmetic number, because the mean of its divisors is an integer number (35179452).

Almost surely, 2^697649028 is an apocalyptic number.

It is an amenable number.

697649028 is an abundant number, since it is smaller than the sum of its proper divisors (990964668).

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

697649028 is a wasteful number, since it uses less digits than its factorization.

697649028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18644 (or 18642 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 51.

The square root of 697649028 is about 26413.0465490068. The cubic root of 697649028 is about 886.9088690164.

The spelling of 697649028 in words is "six hundred ninety-seven million, six hundred forty-nine thousand, twenty-eight".