870840057 has 8 divisors (see below), whose sum is σ = 1164410784. Its totient is φ = 578914688.

The previous prime is 870840023. The next prime is 870840083. The reversal of 870840057 is 750048078.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 870840057 - 2⁶ = 870839993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 870839997 and 870840024.

It is not an unprimeable number, because it can be changed into a prime (870840757) 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, 410103 + ... + 412220.

It is an arithmetic number, because the mean of its divisors is an integer number (145551348).

Almost surely, 2^870840057 is an apocalyptic number.

It is an amenable number.

870840057 is a deficient number, since it is larger than the sum of its proper divisors (293570727).

870840057 is a wasteful number, since it uses less digits than its factorization.

870840057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822679.

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 870840057 is about 29509.9992714334. Note that the first 3 decimals coincide. The cubic root of 870840057 is about 954.9474334890.

The spelling of 870840057 in words is "eight hundred seventy million, eight hundred forty thousand, fifty-seven".