851904144 has 120 divisors (see below), whose sum is σ = 2934381632. Its totient is φ = 224674560.

The previous prime is 851904143. The next prime is 851904161. The reversal of 851904144 is 441409158.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 851904099 and 851904108.

It is not an unprimeable number, because it can be changed into a prime (851904143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19402 + ... + 45609.

Almost surely, 2^851904144 is an apocalyptic number.

851904144 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

851904144 is an abundant number, since it is smaller than the sum of its proper divisors (2082477488).

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

851904144 is a wasteful number, since it uses less digits than its factorization.

851904144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65045 (or 65036 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 851904144 is about 29187.3970062423. The cubic root of 851904144 is about 947.9750567597.

The spelling of 851904144 in words is "eight hundred fifty-one million, nine hundred four thousand, one hundred forty-four".