1390288790 has 24 divisors (see below), whose sum is σ = 2750706000. Its totient is φ = 505559120.

The previous prime is 1390288763. The next prime is 1390288799. The reversal of 1390288790 is 978820931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390288799) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 573290 + ... + 575709.

It is an arithmetic number, because the mean of its divisors is an integer number (114612750).

Almost surely, 2^1390288790 is an apocalyptic number.

1390288790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1390288790 is a deficient number, since it is larger than the sum of its proper divisors (1360417210).

1390288790 is a wasteful number, since it uses less digits than its factorization.

1390288790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149028 (or 1149017 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 1390288790 is about 37286.5765390174. The cubic root of 1390288790 is about 1116.0963135703.

The spelling of 1390288790 in words is "one billion, three hundred ninety million, two hundred eighty-eight thousand, seven hundred ninety".