399620473 has 16 divisors (see below), whose sum is σ = 477429760. Its totient is φ = 327272400.

The previous prime is 399620471. The next prime is 399620509. The reversal of 399620473 is 374026993.

It is not a de Polignac number, because 399620473 - 2¹ = 399620471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399620471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5488 + ... + 28798.

It is an arithmetic number, because the mean of its divisors is an integer number (29839360).

Almost surely, 2^399620473 is an apocalyptic number.

It is an amenable number.

399620473 is a deficient number, since it is larger than the sum of its proper divisors (77809287).

399620473 is a wasteful number, since it uses less digits than its factorization.

399620473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23428.

The product of its (nonzero) digits is 244944, while the sum is 43.

The square root of 399620473 is about 19990.5095732950. The cubic root of 399620473 is about 736.5731944173.

The spelling of 399620473 in words is "three hundred ninety-nine million, six hundred twenty thousand, four hundred seventy-three".