687375940 has 24 divisors (see below), whose sum is σ = 1474204032. Its totient is φ = 269100000.

The previous prime is 687375929. The next prime is 687375961. The reversal of 687375940 is 49573786.

It is a happy number.

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, 364686 + ... + 366565.

It is an arithmetic number, because the mean of its divisors is an integer number (61425168).

Almost surely, 2^687375940 is an apocalyptic number.

It is an amenable number.

687375940 is an abundant number, since it is smaller than the sum of its proper divisors (786828092).

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

687375940 is a wasteful number, since it uses less digits than its factorization.

687375940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731307 (or 731305 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 49.

The square root of 687375940 is about 26217.8553661431. The cubic root of 687375940 is about 882.5339927574.

The spelling of 687375940 in words is "six hundred eighty-seven million, three hundred seventy-five thousand, nine hundred forty".