687942472 has 32 divisors (see below), whose sum is σ = 1483009920. Its totient is φ = 293063040.

The previous prime is 687942461. The next prime is 687942487. The reversal of 687942472 is 274249786.

It is a happy number.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27429 + ... + 46132.

It is an arithmetic number, because the mean of its divisors is an integer number (46344060).

Almost surely, 2^687942472 is an apocalyptic number.

It is an amenable number.

687942472 is an abundant number, since it is smaller than the sum of its proper divisors (795067448).

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

687942472 is a wasteful number, since it uses less digits than its factorization.

687942472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73741 (or 73737 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 49.

The square root of 687942472 is about 26228.6574570640. The cubic root of 687942472 is about 882.7763862912.

The spelling of 687942472 in words is "six hundred eighty-seven million, nine hundred forty-two thousand, four hundred seventy-two".