393846945 has 8 divisors (see below), whose sum is σ = 630155136. Its totient is φ = 210051696.

The previous prime is 393846919. The next prime is 393846949. The reversal of 393846945 is 549648393.

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

It is not a de Polignac number, because 393846945 - 2⁵ = 393846913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (393846949) 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, 13128217 + ... + 13128246.

It is an arithmetic number, because the mean of its divisors is an integer number (78769392).

Almost surely, 2^393846945 is an apocalyptic number.

It is an amenable number.

393846945 is a deficient number, since it is larger than the sum of its proper divisors (236308191).

393846945 is a wasteful number, since it uses less digits than its factorization.

393846945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26256471.

The product of its digits is 2799360, while the sum is 51.

The square root of 393846945 is about 19845.5774670328. The cubic root of 393846945 is about 733.0087524787.

The spelling of 393846945 in words is "three hundred ninety-three million, eight hundred forty-six thousand, nine hundred forty-five".