681681048 has 32 divisors (see below), whose sum is σ = 1729642560. Its totient is φ = 223835040.

The previous prime is 681681029. The next prime is 681681053. The reversal of 681681048 is 840186186.

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, 210358 + ... + 213573.

It is an arithmetic number, because the mean of its divisors is an integer number (54051330).

Almost surely, 2^681681048 is an apocalyptic number.

It is an amenable number.

681681048 is an abundant number, since it is smaller than the sum of its proper divisors (1047961512).

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

681681048 is a wasteful number, since it uses less digits than its factorization.

681681048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424007 (or 424003 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 681681048 is about 26109.0223486059. The cubic root of 681681048 is about 880.0899735829.

The spelling of 681681048 in words is "six hundred eighty-one million, six hundred eighty-one thousand, forty-eight".