857981276 has 6 divisors (see below), whose sum is σ = 1501467240. Its totient is φ = 428990636.

The previous prime is 857981261. The next prime is 857981303. The reversal of 857981276 is 672189758.

It is a super-2 number, since 2×857981276² = 1472263739933176352, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107247656 + ... + 107247663.

It is an arithmetic number, because the mean of its divisors is an integer number (250244540).

Almost surely, 2^857981276 is an apocalyptic number.

It is an amenable number.

857981276 is a deficient number, since it is larger than the sum of its proper divisors (643485964).

857981276 is a wasteful number, since it uses less digits than its factorization.

857981276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214495323 (or 214495321 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 53.

The square root of 857981276 is about 29291.3174165998. The cubic root of 857981276 is about 950.2238718931.

The spelling of 857981276 in words is "eight hundred fifty-seven million, nine hundred eighty-one thousand, two hundred seventy-six".