392490128 has 20 divisors (see below), whose sum is σ = 761022720. Its totient is φ = 196097184.

The previous prime is 392490127. The next prime is 392490139. The reversal of 392490128 is 821094293.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 392490091 and 392490100.

It is not an unprimeable number, because it can be changed into a prime (392490127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14501 + ... + 31547.

It is an arithmetic number, because the mean of its divisors is an integer number (38051136).

Almost surely, 2^392490128 is an apocalyptic number.

It is an amenable number.

392490128 is a deficient number, since it is larger than the sum of its proper divisors (368532592).

392490128 is a wasteful number, since it uses less digits than its factorization.

392490128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18494 (or 18488 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 392490128 is about 19811.3636077883. The cubic root of 392490128 is about 732.1660367681.

The spelling of 392490128 in words is "three hundred ninety-two million, four hundred ninety thousand, one hundred twenty-eight".