1390355172 has 48 divisors (see below), whose sum is σ = 3794347200. Its totient is φ = 439058880.

The previous prime is 1390355167. The next prime is 1390355173. The reversal of 1390355172 is 2715530931.

1390355172 is a `hidden beast` number, since 1 + 39 + 0 + 3 + 551 + 72 = 666.

1390355172 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 (1390355173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336729 + ... + 340832.

It is an arithmetic number, because the mean of its divisors is an integer number (79048900).

Almost surely, 2^1390355172 is an apocalyptic number.

1390355172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1390355172 is an abundant number, since it is smaller than the sum of its proper divisors (2403992028).

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

1390355172 is a wasteful number, since it uses less digits than its factorization.

1390355172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677593 (or 677585 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 1390355172 is about 37287.4666878832. The cubic root of 1390355172 is about 1116.1140766727.

The spelling of 1390355172 in words is "one billion, three hundred ninety million, three hundred fifty-five thousand, one hundred seventy-two".