1320037992 has 128 divisors (see below), whose sum is σ = 4513017600. Its totient is φ = 348136704.

The previous prime is 1320037991. The next prime is 1320037997. The reversal of 1320037992 is 2997300231.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1320037991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13923 + ... + 53234.

It is an arithmetic number, because the mean of its divisors is an integer number (35257950).

Almost surely, 2^1320037992 is an apocalyptic number.

1320037992 is a gapful number since it is divisible by the number (12) 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 1320037992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2256508800).

1320037992 is an abundant number, since it is smaller than the sum of its proper divisors (3192979608).

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

1320037992 is a wasteful number, since it uses less digits than its factorization.

1320037992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67192 (or 67182 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 1320037992 is about 36332.3270930999. The cubic root of 1320037992 is about 1096.9718345659.

The spelling of 1320037992 in words is "one billion, three hundred twenty million, thirty-seven thousand, nine hundred ninety-two".