392540289 has 16 divisors (see below), whose sum is σ = 538973760. Its totient is φ = 253938240.

The previous prime is 392540263. The next prime is 392540329. The reversal of 392540289 is 982045293.

It is not a de Polignac number, because 392540289 - 2¹⁷ = 392409217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 392540289.

It is not an unprimeable number, because it can be changed into a prime (392540219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38634 + ... + 47724.

It is an arithmetic number, because the mean of its divisors is an integer number (33685860).

Almost surely, 2^392540289 is an apocalyptic number.

It is an amenable number.

392540289 is a deficient number, since it is larger than the sum of its proper divisors (146433471).

392540289 is a wasteful number, since it uses less digits than its factorization.

392540289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9520.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 392540289 is about 19812.6295326996. The cubic root of 392540289 is about 732.1972261862.

The spelling of 392540289 in words is "three hundred ninety-two million, five hundred forty thousand, two hundred eighty-nine".