1390464172 has 48 divisors (see below), whose sum is σ = 2583834624. Its totient is φ = 653400000.

The previous prime is 1390464139. The next prime is 1390464191. The reversal of 1390464172 is 2714640931.

It is a super-2 number, since 2×1390464172² = 3866781227231291168, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1402597 + ... + 1403587.

It is an arithmetic number, because the mean of its divisors is an integer number (53829888).

Almost surely, 2^1390464172 is an apocalyptic number.

It is an amenable number.

1390464172 is a deficient number, since it is larger than the sum of its proper divisors (1193370452).

1390464172 is a wasteful number, since it uses less digits than its factorization.

1390464172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270 (or 1268 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 1390464172 is about 37288.9282763664. The cubic root of 1390464172 is about 1116.1432426627.

The spelling of 1390464172 in words is "one billion, three hundred ninety million, four hundred sixty-four thousand, one hundred seventy-two".