399105270 has 24 divisors (see below), whose sum is σ = 1037673936. Its totient is φ = 106428048.

The previous prime is 399105263. The next prime is 399105283. The reversal of 399105270 is 72501993.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2217162 + ... + 2217341.

It is an arithmetic number, because the mean of its divisors is an integer number (43236414).

Almost surely, 2^399105270 is an apocalyptic number.

399105270 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

399105270 is an abundant number, since it is smaller than the sum of its proper divisors (638568666).

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

399105270 is a wasteful number, since it uses less digits than its factorization.

399105270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4434516 (or 4434513 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 399105270 is about 19977.6192275256. The cubic root of 399105270 is about 736.2565206871.

The spelling of 399105270 in words is "three hundred ninety-nine million, one hundred five thousand, two hundred seventy".