399405373 has 8 divisors (see below), whose sum is σ = 417583296. Its totient is φ = 381295200.

The previous prime is 399405367. The next prime is 399405401. The reversal of 399405373 is 373504993.

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

It is a cyclic number.

It is not a de Polignac number, because 399405373 - 2¹⁷ = 399274301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399405073) 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, 4683 + ... + 28648.

It is an arithmetic number, because the mean of its divisors is an integer number (52197912).

Almost surely, 2^399405373 is an apocalyptic number.

It is an amenable number.

399405373 is a deficient number, since it is larger than the sum of its proper divisors (18177923).

399405373 is a wasteful number, since it uses less digits than its factorization.

399405373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33875.

The product of its (nonzero) digits is 306180, while the sum is 43.

The square root of 399405373 is about 19985.1287961824. The cubic root of 399405373 is about 736.4410145616.

The spelling of 399405373 in words is "three hundred ninety-nine million, four hundred five thousand, three hundred seventy-three".