684381504 has 28 divisors (see below), whose sum is σ = 1810759904. Its totient is φ = 228127104.

The previous prime is 684381457. The next prime is 684381521. The reversal of 684381504 is 405183486.

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, 1782052 + ... + 1782435.

Almost surely, 2^684381504 is an apocalyptic number.

684381504 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

684381504 is an abundant number, since it is smaller than the sum of its proper divisors (1126378400).

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

684381504 is a wasteful number, since it uses less digits than its factorization.

684381504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3564502 (or 3564492 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 684381504 is about 26160.6862295315. The cubic root of 684381504 is about 881.2505910564.

The spelling of 684381504 in words is "six hundred eighty-four million, three hundred eighty-one thousand, five hundred four".