682991128 has 8 divisors (see below), whose sum is σ = 1280608380. Its totient is φ = 341495560.

The previous prime is 682991123. The next prime is 682991137. The reversal of 682991128 is 821199286.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (682991123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42686938 + ... + 42686953.

Almost surely, 2^682991128 is an apocalyptic number.

It is an amenable number.

682991128 is a deficient number, since it is larger than the sum of its proper divisors (597617252).

682991128 is a wasteful number, since it uses less digits than its factorization.

682991128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85373897 (or 85373893 counting only the distinct ones).

The product of its digits is 124416, while the sum is 46.

The square root of 682991128 is about 26134.0989513700. The cubic root of 682991128 is about 880.6534093446.

The spelling of 682991128 in words is "six hundred eighty-two million, nine hundred ninety-one thousand, one hundred twenty-eight".