1392630639 has 8 divisors (see below), whose sum is σ = 1916739072. Its totient is φ = 898471320.

The previous prime is 1392630571. The next prime is 1392630643. The reversal of 1392630639 is 9360362931.

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

It is not a de Polignac number, because 1392630639 - 2²⁵ = 1359076207 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1392630639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392650639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7487169 + ... + 7487354.

It is an arithmetic number, because the mean of its divisors is an integer number (239592384).

Almost surely, 2^1392630639 is an apocalyptic number.

1392630639 is a deficient number, since it is larger than the sum of its proper divisors (524108433).

1392630639 is a wasteful number, since it uses less digits than its factorization.

1392630639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14974557.

The product of its (nonzero) digits is 157464, while the sum is 42.

The square root of 1392630639 is about 37317.9667050604. The cubic root of 1392630639 is about 1116.7226253782.

The spelling of 1392630639 in words is "one billion, three hundred ninety-two million, six hundred thirty thousand, six hundred thirty-nine".