392497920 has 288 divisors, whose sum is σ = 1431944640. Its totient is φ = 101744640.

The previous prime is 392497891. The next prime is 392497943. The reversal of 392497920 is 29794293.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1416822 + ... + 1417098.

It is an arithmetic number, because the mean of its divisors is an integer number (4972030).

Almost surely, 2^392497920 is an apocalyptic number.

392497920 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 392497920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (715972320).

392497920 is an abundant number, since it is smaller than the sum of its proper divisors (1039446720).

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

392497920 is a wasteful number, since it uses less digits than its factorization.

392497920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 392497920 is about 19811.5602616250. The cubic root of 392497920 is about 732.1708819005.

The spelling of 392497920 in words is "three hundred ninety-two million, four hundred ninety-seven thousand, nine hundred twenty".