681887058 has 16 divisors (see below), whose sum is σ = 1366169376. Its totient is φ = 226896480.

The previous prime is 681887009. The next prime is 681887069. The reversal of 681887058 is 850788186.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 681887058.

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, 96091 + ... + 102942.

It is an arithmetic number, because the mean of its divisors is an integer number (85385586).

Almost surely, 2^681887058 is an apocalyptic number.

681887058 is an abundant number, since it is smaller than the sum of its proper divisors (684282318).

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

681887058 is a wasteful number, since it uses less digits than its factorization.

681887058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199609.

The product of its (nonzero) digits is 860160, while the sum is 51.

The square root of 681887058 is about 26112.9672385196. The cubic root of 681887058 is about 880.1786216268.

The spelling of 681887058 in words is "six hundred eighty-one million, eight hundred eighty-seven thousand, fifty-eight".