1390412639 has 8 divisors (see below), whose sum is σ = 1733501568. Its totient is φ = 1083438360.

The previous prime is 1390412587. The next prime is 1390412641. The reversal of 1390412639 is 9362140931.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1390412639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390412339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9028577 + ... + 9028730.

It is an arithmetic number, because the mean of its divisors is an integer number (216687696).

Almost surely, 2^1390412639 is an apocalyptic number.

1390412639 is a deficient number, since it is larger than the sum of its proper divisors (343088929).

1390412639 is a wasteful number, since it uses less digits than its factorization.

1390412639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18057325.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 1390412639 is about 37288.2372739715. The cubic root of 1390412639 is about 1116.1294537613.

The spelling of 1390412639 in words is "one billion, three hundred ninety million, four hundred twelve thousand, six hundred thirty-nine".