392738868 has 90 divisors (see below), whose sum is σ = 1060303398. Its totient is φ = 126671040.

The previous prime is 392738867. The next prime is 392738989. The reversal of 392738868 is 868837293.

It can be written as a sum of positive squares in 3 ways, for example, as 1411344 + 391327524 = 1188^2 + 19782^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (392738861) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2169738 + ... + 2169918.

Almost surely, 2^392738868 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 392738868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (530151699).

392738868 is an abundant number, since it is smaller than the sum of its proper divisors (667564530).

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

392738868 is a wasteful number, since it uses less digits than its factorization.

392738868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 223 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 392738868 is about 19817.6403237116. The cubic root of 392738868 is about 732.3206737963.

The spelling of 392738868 in words is "three hundred ninety-two million, seven hundred thirty-eight thousand, eight hundred sixty-eight".