399029478 has 8 divisors (see below), whose sum is σ = 798058968. Its totient is φ = 133009824.

The previous prime is 399029447. The next prime is 399029479. The reversal of 399029478 is 874920993.

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

399029478 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 399029478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399029479) 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, 33252451 + ... + 33252462.

It is an arithmetic number, because the mean of its divisors is an integer number (99757371).

Almost surely, 2^399029478 is an apocalyptic number.

399029478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399029478 is a wasteful number, since it uses less digits than its factorization.

399029478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66504918.

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 399029478 is about 19975.7222147286. The cubic root of 399029478 is about 736.2099115248.

The spelling of 399029478 in words is "three hundred ninety-nine million, twenty-nine thousand, four hundred seventy-eight".