857234972 has 24 divisors (see below), whose sum is σ = 1659595392. Its totient is φ = 384162800.

The previous prime is 857234957. The next prime is 857234977. The reversal of 857234972 is 279432758.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857234977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134078 + ... + 140325.

It is an arithmetic number, because the mean of its divisors is an integer number (69149808).

Almost surely, 2^857234972 is an apocalyptic number.

It is an amenable number.

857234972 is a deficient number, since it is larger than the sum of its proper divisors (802360420).

857234972 is a wasteful number, since it uses less digits than its factorization.

857234972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274489 (or 274487 counting only the distinct ones).

The product of its digits is 846720, while the sum is 47.

The square root of 857234972 is about 29278.5753068690. The cubic root of 857234972 is about 949.9482786246.

The spelling of 857234972 in words is "eight hundred fifty-seven million, two hundred thirty-four thousand, nine hundred seventy-two".