392968881 has 16 divisors (see below), whose sum is σ = 587944320. Its totient is φ = 259383600.

The previous prime is 392968859. The next prime is 392968921. The reversal of 392968881 is 188869293.

It is a happy number.

It is not a de Polignac number, because 392968881 - 2⁶ = 392968817 is a prime.

It is a super-2 number, since 2×392968881² = 308849082868784322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (392968801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69325 + ... + 74778.

It is an arithmetic number, because the mean of its divisors is an integer number (36746520).

Almost surely, 2^392968881 is an apocalyptic number.

It is an amenable number.

392968881 is a deficient number, since it is larger than the sum of its proper divisors (194975439).

392968881 is a wasteful number, since it uses less digits than its factorization.

392968881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144213 (or 144207 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 392968881 is about 19823.4427131112. The cubic root of 392968881 is about 732.4636105038.

The spelling of 392968881 in words is "three hundred ninety-two million, nine hundred sixty-eight thousand, eight hundred eighty-one".