1392899664 has 80 divisors (see below), whose sum is σ = 3910860800. Its totient is φ = 424631808.

The previous prime is 1392899659. The next prime is 1392899693. The reversal of 1392899664 is 4669982931.

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, 57777 + ... + 78255.

It is an arithmetic number, because the mean of its divisors is an integer number (48885760).

Almost surely, 2^1392899664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1392899664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1955430400).

1392899664 is an abundant number, since it is smaller than the sum of its proper divisors (2517961136).

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

1392899664 is a wasteful number, since it uses less digits than its factorization.

1392899664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20612 (or 20606 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 57.

The square root of 1392899664 is about 37321.5710280261. The cubic root of 1392899664 is about 1116.7945293353.

The spelling of 1392899664 in words is "one billion, three hundred ninety-two million, eight hundred ninety-nine thousand, six hundred sixty-four".