399145470 has 32 divisors (see below), whose sum is σ = 962260992. Its totient is φ = 105959712.

The previous prime is 399145463. The next prime is 399145489. The reversal of 399145470 is 74541993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23142 + ... + 36521.

It is an arithmetic number, because the mean of its divisors is an integer number (30070656).

Almost surely, 2^399145470 is an apocalyptic number.

399145470 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

399145470 is an abundant number, since it is smaller than the sum of its proper divisors (563115522).

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

399145470 is a wasteful number, since it uses less digits than its factorization.

399145470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59896.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 399145470 is about 19978.6253280850. The cubic root of 399145470 is about 736.2812397447.

The spelling of 399145470 in words is "three hundred ninety-nine million, one hundred forty-five thousand, four hundred seventy".