687395432 has 32 divisors (see below), whose sum is σ = 1312934400. Its totient is φ = 337331904.

The previous prime is 687395399. The next prime is 687395437. The reversal of 687395432 is 234593786.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (687395437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106193 + ... + 112479.

It is an arithmetic number, because the mean of its divisors is an integer number (41029200).

Almost surely, 2^687395432 is an apocalyptic number.

It is an amenable number.

687395432 is a deficient number, since it is larger than the sum of its proper divisors (625538968).

687395432 is a wasteful number, since it uses less digits than its factorization.

687395432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6545 (or 6541 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 47.

The square root of 687395432 is about 26218.2270949048. The cubic root of 687395432 is about 882.5423347185.

The spelling of 687395432 in words is "six hundred eighty-seven million, three hundred ninety-five thousand, four hundred thirty-two".