857149902 has 24 divisors (see below), whose sum is σ = 2122466736. Its totient is φ = 244899936.

The previous prime is 857149883. The next prime is 857149919. The reversal of 857149902 is 209941758.

857149902 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3401263 + ... + 3401514.

It is an arithmetic number, because the mean of its divisors is an integer number (88436114).

Almost surely, 2^857149902 is an apocalyptic number.

857149902 is an abundant number, since it is smaller than the sum of its proper divisors (1265316834).

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

857149902 is a wasteful number, since it uses less digits than its factorization.

857149902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6802792 (or 6802789 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 857149902 is about 29277.1225020493. The cubic root of 857149902 is about 949.9168540343.

The spelling of 857149902 in words is "eight hundred fifty-seven million, one hundred forty-nine thousand, nine hundred two".