1390380858 has 24 divisors (see below), whose sum is σ = 3022190496. Its totient is φ = 461968200.

The previous prime is 1390380839. The next prime is 1390380863. The reversal of 1390380858 is 8580830931.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118588 + ... + 129783.

It is an arithmetic number, because the mean of its divisors is an integer number (125924604).

Almost surely, 2^1390380858 is an apocalyptic number.

1390380858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1390380858 is an abundant number, since it is smaller than the sum of its proper divisors (1631809638).

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

1390380858 is a wasteful number, since it uses less digits than its factorization.

1390380858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248690 (or 248687 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1390380858 is about 37287.8111183802. The cubic root of 1390380858 is about 1116.1209498157.

The spelling of 1390380858 in words is "one billion, three hundred ninety million, three hundred eighty thousand, eight hundred fifty-eight".