690948864 has 54 divisors (see below), whose sum is σ = 1992182556. Its totient is φ = 230315520.

The previous prime is 690948821. The next prime is 690948877. The reversal of 690948864 is 468849096.

It is a self number, because there is not a number n which added to its sum of digits gives 690948864.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 147642 + ... + 152249.

Almost surely, 2^690948864 is an apocalyptic number.

690948864 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

690948864 is an abundant number, since it is smaller than the sum of its proper divisors (1301233692).

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

690948864 is a wasteful number, since it uses less digits than its factorization.

690948864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299913 (or 299896 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The square root of 690948864 is about 26285.9061856349. The cubic root of 690948864 is about 884.0604641866.

The spelling of 690948864 in words is "six hundred ninety million, nine hundred forty-eight thousand, eight hundred sixty-four".