399384270 has 40 divisors (see below), whose sum is σ = 1073902104. Its totient is φ = 106502256.

The previous prime is 399384257. The next prime is 399384277. The reversal of 399384270 is 72483993.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399384277) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 245724 + ... + 247343.

Almost surely, 2^399384270 is an apocalyptic number.

399384270 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

399384270 is an abundant number, since it is smaller than the sum of its proper divisors (674517834).

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

399384270 is a wasteful number, since it uses less digits than its factorization.

399384270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493086 (or 493077 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 399384270 is about 19984.6008216326. The cubic root of 399384270 is about 736.4280441231.

The spelling of 399384270 in words is "three hundred ninety-nine million, three hundred eighty-four thousand, two hundred seventy".