851428931 has 8 divisors (see below), whose sum is σ = 898211280. Its totient is φ = 804843648.

The previous prime is 851428909. The next prime is 851428967. The reversal of 851428931 is 139824158.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-851428931 is a prime.

It is a super-2 number, since 2×851428931² = 1449862449087605522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (851428031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40346 + ... + 57711.

It is an arithmetic number, because the mean of its divisors is an integer number (112276410).

Almost surely, 2^851428931 is an apocalyptic number.

851428931 is a deficient number, since it is larger than the sum of its proper divisors (46782349).

851428931 is a wasteful number, since it uses less digits than its factorization.

851428931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98533.

The product of its digits is 69120, while the sum is 41.

The square root of 851428931 is about 29179.2551481356. The cubic root of 851428931 is about 947.7987560712.

The spelling of 851428931 in words is "eight hundred fifty-one million, four hundred twenty-eight thousand, nine hundred thirty-one".