868660428 has 24 divisors (see below), whose sum is σ = 2028000240. Its totient is φ = 289392640.

The previous prime is 868660409. The next prime is 868660447. The reversal of 868660428 is 824066868.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (868660409) and next prime (868660447).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

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, 3508 + ... + 41828.

It is an arithmetic number, because the mean of its divisors is an integer number (84500010).

Almost surely, 2^868660428 is an apocalyptic number.

It is an amenable number.

868660428 is an abundant number, since it is smaller than the sum of its proper divisors (1159339812).

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

868660428 is a wasteful number, since it uses less digits than its factorization.

868660428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40217 (or 40215 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 48.

The square root of 868660428 is about 29473.0457876345. The cubic root of 868660428 is about 954.1500539694.

The spelling of 868660428 in words is "eight hundred sixty-eight million, six hundred sixty thousand, four hundred twenty-eight".