687057464 has 16 divisors (see below), whose sum is σ = 1329789120. Its totient is φ = 332447040.

The previous prime is 687057451. The next prime is 687057487. The reversal of 687057464 is 464750786.

It is a happy number.

687057464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×687057464² = 944095917676222592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1384949 + ... + 1385444.

It is an arithmetic number, because the mean of its divisors is an integer number (83111820).

Almost surely, 2^687057464 is an apocalyptic number.

It is an amenable number.

687057464 is a deficient number, since it is larger than the sum of its proper divisors (642731656).

687057464 is a wasteful number, since it uses less digits than its factorization.

687057464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2770430 (or 2770426 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 47.

The square root of 687057464 is about 26211.7810154137. The cubic root of 687057464 is about 882.3976727329.

The spelling of 687057464 in words is "six hundred eighty-seven million, fifty-seven thousand, four hundred sixty-four".