1392290928 has 120 divisors (see below), whose sum is σ = 4606773600. Its totient is φ = 384072192.

The previous prime is 1392290897. The next prime is 1392290971. The reversal of 1392290928 is 8290922931.

It is a happy number.

It is a super-2 number, since 2×1392290928² = 3876948056382202368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5418 + ... + 53046.

It is an arithmetic number, because the mean of its divisors is an integer number (38389780).

Almost surely, 2^1392290928 is an apocalyptic number.

1392290928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1392290928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2303386800).

1392290928 is an abundant number, since it is smaller than the sum of its proper divisors (3214482672).

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

1392290928 is a wasteful number, since it uses less digits than its factorization.

1392290928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47679 (or 47670 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 1392290928 is about 37313.4148531061. The cubic root of 1392290928 is about 1116.6318155109.

The spelling of 1392290928 in words is "one billion, three hundred ninety-two million, two hundred ninety thousand, nine hundred twenty-eight".