392640484 has 6 divisors (see below), whose sum is σ = 687120854. Its totient is φ = 196320240.

The previous prime is 392640473. The next prime is 392640487. The reversal of 392640484 is 484046293.

It can be written as a sum of positive squares in only one way, i.e., 385022884 + 7617600 = 19622^2 + 2760^2 .

It is not an unprimeable number, because it can be changed into a prime (392640487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49080057 + ... + 49080064.

Almost surely, 2^392640484 is an apocalyptic number.

It is an amenable number.

392640484 is a deficient number, since it is larger than the sum of its proper divisors (294480370).

392640484 is a wasteful number, since it uses less digits than its factorization.

392640484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98160125 (or 98160123 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 392640484 is about 19815.1579352777. The cubic root of 392640484 is about 732.2595181022.

The spelling of 392640484 in words is "three hundred ninety-two million, six hundred forty thousand, four hundred eighty-four".