687020072 has 32 divisors (see below), whose sum is σ = 1315828800. Its totient is φ = 336184704.

The previous prime is 687020039. The next prime is 687020083. The reversal of 687020072 is 270020786.

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, 106853 + ... + 113099.

It is an arithmetic number, because the mean of its divisors is an integer number (41119650).

Almost surely, 2^687020072 is an apocalyptic number.

It is an amenable number.

687020072 is a deficient number, since it is larger than the sum of its proper divisors (628808728).

687020072 is a wasteful number, since it uses less digits than its factorization.

687020072 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 (nonzero) digits is 9408, while the sum is 32.

The square root of 687020072 is about 26211.0677386481. The cubic root of 687020072 is about 882.3816647500.

The spelling of 687020072 in words is "six hundred eighty-seven million, twenty thousand, seventy-two".