851005872 has 40 divisors (see below), whose sum is σ = 2442703280. Its totient is φ = 283668480.

The previous prime is 851005871. The next prime is 851005913. The reversal of 851005872 is 278500158.

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

It is not an unprimeable number, because it can be changed into a prime (851005871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 984529 + ... + 985392.

It is an arithmetic number, because the mean of its divisors is an integer number (61067582).

Almost surely, 2^851005872 is an apocalyptic number.

It is an amenable number.

851005872 is an abundant number, since it is smaller than the sum of its proper divisors (1591697408).

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

851005872 is a wasteful number, since it uses less digits than its factorization.

851005872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1969938 (or 1969926 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 851005872 is about 29172.0049362398. The cubic root of 851005872 is about 947.6417489467.

The spelling of 851005872 in words is "eight hundred fifty-one million, five thousand, eight hundred seventy-two".