851383936 has 64 divisors (see below), whose sum is σ = 1934097480. Its totient is φ = 369819648.

The previous prime is 851383927. The next prime is 851383957. The reversal of 851383936 is 639383158.

It can be written as a sum of positive squares in 4 ways, for example, as 430313536 + 421070400 = 20744^2 + 20520^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13240 + ... + 43336.

Almost surely, 2^851383936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 851383936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (967048740).

851383936 is an abundant number, since it is smaller than the sum of its proper divisors (1082713544).

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

851383936 is a wasteful number, since it uses less digits than its factorization.

851383936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30141 (or 30129 counting only the distinct ones).

The product of its digits is 466560, while the sum is 46.

The square root of 851383936 is about 29178.4841278638. The cubic root of 851383936 is about 947.7820598426.

The spelling of 851383936 in words is "eight hundred fifty-one million, three hundred eighty-three thousand, nine hundred thirty-six".