392881320 has 128 divisors (see below), whose sum is σ = 1410393600. Its totient is φ = 96705792.

The previous prime is 392881303. The next prime is 392881327. The reversal of 392881320 is 23188293.

It is a happy number.

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 (392881327) 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, 49 + ... + 28031.

It is an arithmetic number, because the mean of its divisors is an integer number (11018700).

Almost surely, 2^392881320 is an apocalyptic number.

392881320 is a gapful number since it is divisible by the number (30) 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 392881320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (705196800).

392881320 is an abundant number, since it is smaller than the sum of its proper divisors (1017512280).

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

392881320 is a wasteful number, since it uses less digits than its factorization.

392881320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28016 (or 28006 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 392881320 is about 19821.2340685438. The cubic root of 392881320 is about 732.4092041514.

The spelling of 392881320 in words is "three hundred ninety-two million, eight hundred eighty-one thousand, three hundred twenty".