684432880 has 40 divisors (see below), whose sum is σ = 1642644864. Its totient is φ = 264940800.

The previous prime is 684432851. The next prime is 684432893. The reversal of 684432880 is 88234486.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×684432880³ (a number of 27 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent 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, 135511 + ... + 140470.

Almost surely, 2^684432880 is an apocalyptic number.

It is an amenable number.

684432880 is an abundant number, since it is smaller than the sum of its proper divisors (958211984).

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

684432880 is a wasteful number, since it uses less digits than its factorization.

684432880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276025 (or 276019 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 43.

The square root of 684432880 is about 26161.6681425325. The cubic root of 684432880 is about 881.2726421089.

The spelling of 684432880 in words is "six hundred eighty-four million, four hundred thirty-two thousand, eight hundred eighty".