685444632 has 32 divisors (see below), whose sum is σ = 1721108400. Its totient is φ = 227481984.

The previous prime is 685444631. The next prime is 685444633. The reversal of 685444632 is 236444586.

It is an interprime number because it is at equal distance from previous prime (685444631) and next prime (685444633).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685444631) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 56863 + ... + 67854.

Almost surely, 2^685444632 is an apocalyptic number.

It is an amenable number.

685444632 is an abundant number, since it is smaller than the sum of its proper divisors (1035663768).

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

685444632 is a wasteful number, since it uses less digits than its factorization.

685444632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124955 (or 124951 counting only the distinct ones).

The product of its digits is 552960, while the sum is 42.

The square root of 685444632 is about 26180.9975363812. The cubic root of 685444632 is about 881.7066707279.

The spelling of 685444632 in words is "six hundred eighty-five million, four hundred forty-four thousand, six hundred thirty-two".