1390389931 has 8 divisors (see below), whose sum is σ = 1682488800. Its totient is φ = 1121659008.

The previous prime is 1390389887. The next prime is 1390389941. The reversal of 1390389931 is 1399830931.

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

It is a cyclic number.

It is not a de Polignac number, because 1390389931 - 2¹¹ = 1390387883 is a prime.

It is a super-2 number, since 2×1390389931² = 3866368320452369522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1390389941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5841856 + ... + 5842093.

It is an arithmetic number, because the mean of its divisors is an integer number (210311100).

Almost surely, 2^1390389931 is an apocalyptic number.

1390389931 is a deficient number, since it is larger than the sum of its proper divisors (292098869).

1390389931 is a wasteful number, since it uses less digits than its factorization.

1390389931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11683973.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 1390389931 is about 37287.9327799222. The cubic root of 1390389931 is about 1116.1233775781.

The spelling of 1390389931 in words is "one billion, three hundred ninety million, three hundred eighty-nine thousand, nine hundred thirty-one".