393989398 has 8 divisors (see below), whose sum is σ = 644709960. Its totient is φ = 179086080.

The previous prime is 393989381. The next prime is 393989441. The reversal of 393989398 is 893989393.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8954283 + ... + 8954326.

It is an arithmetic number, because the mean of its divisors is an integer number (80588745).

Almost surely, 2^393989398 is an apocalyptic number.

393989398 is a deficient number, since it is larger than the sum of its proper divisors (250720562).

393989398 is a wasteful number, since it uses less digits than its factorization.

393989398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17908622.

The product of its digits is 11337408, while the sum is 61.

The square root of 393989398 is about 19849.1661789608. The cubic root of 393989398 is about 733.0971173543.

The spelling of 393989398 in words is "three hundred ninety-three million, nine hundred eighty-nine thousand, three hundred ninety-eight".