858820956 has 48 divisors (see below), whose sum is σ = 2305390080. Its totient is φ = 243748800.

The previous prime is 858820913. The next prime is 858820961. The reversal of 858820956 is 659028858.

It is a junction number, because it is equal to n+sod(n) for n = 858820899 and 858820908.

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 15 ways as a sum of consecutive naturals, for example, 21171 + ... + 46538.

It is an arithmetic number, because the mean of its divisors is an integer number (48028960).

Almost surely, 2^858820956 is an apocalyptic number.

It is an amenable number.

858820956 is an abundant number, since it is smaller than the sum of its proper divisors (1446569124).

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

858820956 is a wasteful number, since it uses less digits than its factorization.

858820956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67874 (or 67872 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 51.

The square root of 858820956 is about 29305.6471691038. The cubic root of 858820956 is about 950.5337558251.

The spelling of 858820956 in words is "eight hundred fifty-eight million, eight hundred twenty thousand, nine hundred fifty-six".