696320640 has 96 divisors (see below), whose sum is σ = 2404502100. Its totient is φ = 185683968.

The previous prime is 696320627. The next prime is 696320659. The reversal of 696320640 is 46023696.

696320640 is a `hidden beast` number, since 6 + 9 + 6 + 3 + 2 + 0 + 640 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 695693376 + 627264 = 26376^2 + 792^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 696320595 and 696320604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54685 + ... + 66204.

Almost surely, 2^696320640 is an apocalyptic number.

696320640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

696320640 is an abundant number, since it is smaller than the sum of its proper divisors (1708181460).

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

696320640 is a wasteful number, since it uses less digits than its factorization.

696320640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120914 (or 120899 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 696320640 is about 26387.8881307315. Note that the first 3 decimals coincide. The cubic root of 696320640 is about 886.3455926325.

The spelling of 696320640 in words is "six hundred ninety-six million, three hundred twenty thousand, six hundred forty".