1392492816 has 160 divisors (see below), whose sum is σ = 4695949440. Its totient is φ = 389491200.

The previous prime is 1392492809. The next prime is 1392492821. The reversal of 1392492816 is 6182942931.

It is a super-2 number, since 2×1392492816² = 3878072485223219712, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50506 + ... + 73046.

It is an arithmetic number, because the mean of its divisors is an integer number (29349684).

Almost surely, 2^1392492816 is an apocalyptic number.

1392492816 is a gapful number since it is divisible by the number (16) 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 1392492816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2347974720).

1392492816 is an abundant number, since it is smaller than the sum of its proper divisors (3303456624).

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

1392492816 is a wasteful number, since it uses less digits than its factorization.

1392492816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22582 (or 22570 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 1392492816 is about 37316.1200555470. The cubic root of 1392492816 is about 1116.6857849948.

The spelling of 1392492816 in words is "one billion, three hundred ninety-two million, four hundred ninety-two thousand, eight hundred sixteen".