399270 has 16 divisors (see below), whose sum is σ = 958320. Its totient is φ = 106464.

The previous prime is 399263. The next prime is 399271. The reversal of 399270 is 72993.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 13309 = 399270 / (3 + 9 + 9 + 2 + 7 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399271) by changing a digit.

399270 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6625 + ... + 6684.

It is an arithmetic number, because the mean of its divisors is an integer number (59895).

2³⁹⁹²⁷⁰ is an apocalyptic number.

399270 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

399270 is an abundant number, since it is smaller than the sum of its proper divisors (559050).

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

399270 is a wasteful number, since it uses less digits than its factorization.

399270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13319.

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 399270 is about 631.8781528111. The cubic root of 399270 is about 73.6357802949.

The spelling of 399270 in words is "three hundred ninety-nine thousand, two hundred seventy".