392728961 has 8 divisors (see below), whose sum is σ = 396686400. Its totient is φ = 388786320.

The previous prime is 392728949. The next prime is 392728969. The reversal of 392728961 is 169827293.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-392728961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (392728969) 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, 54095 + ... + 60923.

It is an arithmetic number, because the mean of its divisors is an integer number (49585800).

Almost surely, 2^392728961 is an apocalyptic number.

It is an amenable number.

392728961 is a deficient number, since it is larger than the sum of its proper divisors (3957439).

392728961 is a wasteful number, since it uses less digits than its factorization.

392728961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7399.

The product of its digits is 326592, while the sum is 47.

The square root of 392728961 is about 19817.3903680581. The cubic root of 392728961 is about 732.3145160474.

The spelling of 392728961 in words is "three hundred ninety-two million, seven hundred twenty-eight thousand, nine hundred sixty-one".