1390338963 has 24 divisors (see below), whose sum is σ = 2166423168. Its totient is φ = 854140032.

The previous prime is 1390338959. The next prime is 1390338979. The reversal of 1390338963 is 3698330931.

It is not a de Polignac number, because 1390338963 - 2² = 1390338959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1390338563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61231 + ... + 80807.

It is an arithmetic number, because the mean of its divisors is an integer number (90267632).

Almost surely, 2^1390338963 is an apocalyptic number.

1390338963 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1390338963 is a deficient number, since it is larger than the sum of its proper divisors (776084205).

1390338963 is a wasteful number, since it uses less digits than its factorization.

1390338963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20203 (or 20200 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 45.

The square root of 1390338963 is about 37287.2493353961. The cubic root of 1390338963 is about 1116.1097393725.

The spelling of 1390338963 in words is "one billion, three hundred ninety million, three hundred thirty-eight thousand, nine hundred sixty-three".