1390625398 has 32 divisors (see below), whose sum is σ = 2252668320. Its totient is φ = 641433600.

The previous prime is 1390625323. The next prime is 1390625417. The reversal of 1390625398 is 8935260931.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 867798 + ... + 869398.

It is an arithmetic number, because the mean of its divisors is an integer number (70395885).

Almost surely, 2^1390625398 is an apocalyptic number.

1390625398 is a deficient number, since it is larger than the sum of its proper divisors (862042922).

1390625398 is a wasteful number, since it uses less digits than its factorization.

1390625398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 1390625398 is about 37291.0900618365. The cubic root of 1390625398 is about 1116.1863803811.

It can be divided in two parts, 13906 and 25398, that added together give a cube (39304 = 34³).

The spelling of 1390625398 in words is "one billion, three hundred ninety million, six hundred twenty-five thousand, three hundred ninety-eight".