399370 has 8 divisors (see below), whose sum is σ = 718884. Its totient is φ = 159744.

The previous prime is 399353. The next prime is 399379. The reversal of 399370 is 73993.

It can be written as a sum of positive squares in 2 ways, for example, as 393129 + 6241 = 627^2 + 79^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a zygodrome in base 9.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 399370.

It is not an unprimeable number, because it can be changed into a prime (399379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19959 + ... + 19978.

2³⁹⁹³⁷⁰ is an apocalyptic number.

399370 is a deficient number, since it is larger than the sum of its proper divisors (319514).

399370 is a wasteful number, since it uses less digits than its factorization.

399370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39944.

The product of its (nonzero) digits is 5103, while the sum is 31.

The square root of 399370 is about 631.9572770370. The cubic root of 399370 is about 73.6419273161.

It can be divided in two parts, 39 and 9370, that added together give a square (9409 = 97²).

The spelling of 399370 in words is "three hundred ninety-nine thousand, three hundred seventy".