393968902 has 8 divisors (see below), whose sum is σ = 591366096. Its totient is φ = 196846872.

The previous prime is 393968893. The next prime is 393968903. The reversal of 393968902 is 209869393.

It is a happy number.

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

It is a super-2 number, since 2×393968902² = 310422991486171208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393968903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65173 + ... + 70960.

It is an arithmetic number, because the mean of its divisors is an integer number (73920762).

Almost surely, 2^393968902 is an apocalyptic number.

393968902 is a deficient number, since it is larger than the sum of its proper divisors (197397194).

393968902 is a wasteful number, since it uses less digits than its factorization.

393968902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137582.

The product of its (nonzero) digits is 629856, while the sum is 49.

The square root of 393968902 is about 19848.6498785182. The cubic root of 393968902 is about 733.0844048134.

The spelling of 393968902 in words is "three hundred ninety-three million, nine hundred sixty-eight thousand, nine hundred two".