684375438 has 32 divisors (see below), whose sum is σ = 1389723552. Its totient is φ = 224640000.

The previous prime is 684375427. The next prime is 684375457. The reversal of 684375438 is 834573486.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 525388 + ... + 526688.

It is an arithmetic number, because the mean of its divisors is an integer number (43428861).

Almost surely, 2^684375438 is an apocalyptic number.

684375438 is an abundant number, since it is smaller than the sum of its proper divisors (705348114).

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

684375438 is a wasteful number, since it uses less digits than its factorization.

684375438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580.

The product of its digits is 1935360, while the sum is 48.

The square root of 684375438 is about 26160.5702919489. The cubic root of 684375438 is about 881.2479874005.

The spelling of 684375438 in words is "six hundred eighty-four million, three hundred seventy-five thousand, four hundred thirty-eight".