393336381 has 8 divisors (see below), whose sum is σ = 538622944. Its totient is φ = 255137040.

The previous prime is 393336371. The next prime is 393336397. The reversal of 393336381 is 183633393.

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

It is not a de Polignac number, because 393336381 - 2²² = 389142077 is a prime.

It is a super-2 number, since 2×393336381² = 309427017236354322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393336311) 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, 1771675 + ... + 1771896.

It is an arithmetic number, because the mean of its divisors is an integer number (67327868).

Almost surely, 2^393336381 is an apocalyptic number.

It is an amenable number.

393336381 is a deficient number, since it is larger than the sum of its proper divisors (145286563).

393336381 is a wasteful number, since it uses less digits than its factorization.

393336381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3543611.

The product of its digits is 104976, while the sum is 39.

The square root of 393336381 is about 19832.7098753549. The cubic root of 393336381 is about 732.6918698919.

The spelling of 393336381 in words is "three hundred ninety-three million, three hundred thirty-six thousand, three hundred eighty-one".