399480078 has 8 divisors (see below), whose sum is σ = 798960168. Its totient is φ = 133160024.

The previous prime is 399479999. The next prime is 399480089. The reversal of 399480078 is 870084993.

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

399480078 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33290001 + ... + 33290012.

It is an arithmetic number, because the mean of its divisors is an integer number (99870021).

Almost surely, 2^399480078 is an apocalyptic number.

399480078 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.

399480078 is a wasteful number, since it uses less digits than its factorization.

399480078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66580018.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 399480078 is about 19986.9977235202. The cubic root of 399480078 is about 736.4869264763.

The spelling of 399480078 in words is "three hundred ninety-nine million, four hundred eighty thousand, seventy-eight".