857947090 has 192 divisors, whose sum is σ = 2200919040. Its totient is φ = 233176320.

The previous prime is 857947087. The next prime is 857947133. The reversal of 857947090 is 90749758.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2472297 + ... + 2472643.

It is an arithmetic number, because the mean of its divisors is an integer number (11463120).

Almost surely, 2^857947090 is an apocalyptic number.

857947090 is an abundant number, since it is smaller than the sum of its proper divisors (1342971950).

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

857947090 is a wasteful number, since it uses less digits than its factorization.

857947090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 857947090 is about 29290.7338590210. The cubic root of 857947090 is about 950.2112512662.

The spelling of 857947090 in words is "eight hundred fifty-seven million, nine hundred forty-seven thousand, ninety".