851438452 has 12 divisors (see below), whose sum is σ = 1505378980. Its totient is φ = 421330176.

The previous prime is 851438447. The next prime is 851438459. The reversal of 851438452 is 254834158.

It can be written as a sum of positive squares in 2 ways, for example, as 238578916 + 612859536 = 15446^2 + 24756^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851438459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1096827 + ... + 1097602.

Almost surely, 2^851438452 is an apocalyptic number.

It is an amenable number.

851438452 is a deficient number, since it is larger than the sum of its proper divisors (653940528).

851438452 is a wasteful number, since it uses less digits than its factorization.

851438452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2194530 (or 2194528 counting only the distinct ones).

The product of its digits is 153600, while the sum is 40.

The square root of 851438452 is about 29179.4182944074. The cubic root of 851438452 is about 947.8022889393.

The spelling of 851438452 in words is "eight hundred fifty-one million, four hundred thirty-eight thousand, four hundred fifty-two".