681904160 has 48 divisors (see below), whose sum is σ = 1841144256. Its totient is φ = 233795328.

The previous prime is 681904159. The next prime is 681904183. The reversal of 681904160 is 61409186.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 681904160.

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, 303302 + ... + 305541.

It is an arithmetic number, because the mean of its divisors is an integer number (38357172).

Almost surely, 2^681904160 is an apocalyptic number.

It is an amenable number.

681904160 is an abundant number, since it is smaller than the sum of its proper divisors (1159240096).

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

681904160 is a wasteful number, since it uses less digits than its factorization.

681904160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608865 (or 608857 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 681904160 is about 26113.2946982950. The cubic root of 681904160 is about 880.1859799758.

The spelling of 681904160 in words is "six hundred eighty-one million, nine hundred four thousand, one hundred sixty".