399788474 has 8 divisors (see below), whose sum is σ = 599876928. Its totient is φ = 199829500.

The previous prime is 399788471. The next prime is 399788491. The reversal of 399788474 is 474887993.

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

It is not an unprimeable number, because it can be changed into a prime (399788471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24242 + ... + 37245.

It is an arithmetic number, because the mean of its divisors is an integer number (74984616).

Almost surely, 2^399788474 is an apocalyptic number.

399788474 is a deficient number, since it is larger than the sum of its proper divisors (200088454).

399788474 is a wasteful number, since it uses less digits than its factorization.

399788474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64740.

The product of its digits is 12192768, while the sum is 59.

The square root of 399788474 is about 19994.7111507018. The cubic root of 399788474 is about 736.6763987531.

The spelling of 399788474 in words is "three hundred ninety-nine million, seven hundred eighty-eight thousand, four hundred seventy-four".