851425044 has 48 divisors (see below), whose sum is σ = 2059470336. Its totient is φ = 273484800.

The previous prime is 851425033. The next prime is 851425073. The reversal of 851425044 is 440524158.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 851424996 and 851425014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84904 + ... + 94400.

It is an arithmetic number, because the mean of its divisors is an integer number (42905632).

Almost surely, 2^851425044 is an apocalyptic number.

It is an amenable number.

851425044 is an abundant number, since it is smaller than the sum of its proper divisors (1208045292).

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

851425044 is a wasteful number, since it uses less digits than its factorization.

851425044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9776 (or 9774 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 33.

The square root of 851425044 is about 29179.1885425212. The cubic root of 851425044 is about 947.7973137510.

The spelling of 851425044 in words is "eight hundred fifty-one million, four hundred twenty-five thousand, forty-four".