392421968 has 40 divisors (see below), whose sum is σ = 788654880. Its totient is φ = 188935040.

The previous prime is 392421961. The next prime is 392421973. The reversal of 392421968 is 869124293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (392421961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215783 + ... + 217593.

It is an arithmetic number, because the mean of its divisors is an integer number (19716372).

Almost surely, 2^392421968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 392421968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (394327440).

392421968 is an abundant number, since it is smaller than the sum of its proper divisors (396232912).

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

392421968 is a wasteful number, since it uses less digits than its factorization.

392421968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2315 (or 2309 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 392421968 is about 19809.6433082476. The cubic root of 392421968 is about 732.1236515609.

The spelling of 392421968 in words is "three hundred ninety-two million, four hundred twenty-one thousand, nine hundred sixty-eight".