399147078 has 16 divisors (see below), whose sum is σ = 870866496. Its totient is φ = 120953640.

The previous prime is 399147061. The next prime is 399147107. The reversal of 399147078 is 870741993.

It is a congruent number.

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, 3023776 + ... + 3023907.

It is an arithmetic number, because the mean of its divisors is an integer number (54429156).

Almost surely, 2^399147078 is an apocalyptic number.

399147078 is an abundant number, since it is smaller than the sum of its proper divisors (471719418).

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

399147078 is a wasteful number, since it uses less digits than its factorization.

399147078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6047699.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 399147078 is about 19978.6655710535. The cubic root of 399147078 is about 736.2822284725.

The spelling of 399147078 in words is "three hundred ninety-nine million, one hundred forty-seven thousand, seventy-eight".