399710378 has 16 divisors (see below), whose sum is σ = 605499840. Its totient is φ = 197884896.

The previous prime is 399710359. The next prime is 399710387. The reversal of 399710378 is 873017993.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118625 + ... + 121947.

It is an arithmetic number, because the mean of its divisors is an integer number (37843740).

Almost surely, 2^399710378 is an apocalyptic number.

399710378 is a deficient number, since it is larger than the sum of its proper divisors (205789462).

399710378 is a wasteful number, since it uses less digits than its factorization.

399710378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 399710378 is about 19992.7581388862. The cubic root of 399710378 is about 736.6284273629.

The spelling of 399710378 in words is "three hundred ninety-nine million, seven hundred ten thousand, three hundred seventy-eight".