840431272 has 16 divisors (see below), whose sum is σ = 1593515700. Its totient is φ = 415493760.

The previous prime is 840431219. The next prime is 840431287. The reversal of 840431272 is 272134048.

It can be written as a sum of positive squares in 2 ways, for example, as 762532996 + 77898276 = 27614^2 + 8826^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589479 + ... + 590902.

Almost surely, 2^840431272 is an apocalyptic number.

It is an amenable number.

840431272 is a deficient number, since it is larger than the sum of its proper divisors (753084428).

840431272 is a wasteful number, since it uses less digits than its factorization.

840431272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180476 (or 1180472 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 840431272 is about 28990.1926864931. The cubic root of 840431272 is about 943.7002453661.

The spelling of 840431272 in words is "eight hundred forty million, four hundred thirty-one thousand, two hundred seventy-two".