392397268649 has 8 divisors (see below), whose sum is σ = 408557574600. Its totient is φ = 376550755200.

The previous prime is 392397268643. The next prime is 392397268657. The reversal of 392397268649 is 946862793293.

It can be written as a sum of positive squares in 4 ways, for example, as 83444721424 + 308952547225 = 288868^2 + 555835^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 392397268649 - 2²⁸ = 392128833193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (392397268643) 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, 78445574 + ... + 78450575.

It is an arithmetic number, because the mean of its divisors is an integer number (51069696825).

Almost surely, 2^392397268649 is an apocalyptic number.

It is an amenable number.

392397268649 is a deficient number, since it is larger than the sum of its proper divisors (16160305951).

392397268649 is a wasteful number, since it uses less digits than its factorization.

392397268649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156896251.

The product of its digits is 211631616, while the sum is 68.

The spelling of 392397268649 in words is "three hundred ninety-two billion, three hundred ninety-seven million, two hundred sixty-eight thousand, six hundred forty-nine".