856950520 has 16 divisors (see below), whose sum is σ = 1928138760. Its totient is φ = 342780192.

The previous prime is 856950511. The next prime is 856950533. The reversal of 856950520 is 25059658.

It is a super-3 number, since 3×856950520³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 21423763 = 856950520 / (8 + 5 + 6 + 9 + 5 + 0 + 5 + 2 + 0).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10711842 + ... + 10711921.

Almost surely, 2^856950520 is an apocalyptic number.

It is an amenable number.

856950520 is an abundant number, since it is smaller than the sum of its proper divisors (1071188240).

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

856950520 is a wasteful number, since it uses less digits than its factorization.

856950520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21423774 (or 21423770 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 40.

The square root of 856950520 is about 29273.7172221090. The cubic root of 856950520 is about 949.8431948027.

The spelling of 856950520 in words is "eight hundred fifty-six million, nine hundred fifty thousand, five hundred twenty".