399030420 has 24 divisors (see below), whose sum is σ = 1117285344. Its totient is φ = 106408096.

The previous prime is 399030413. The next prime is 399030421. The reversal of 399030420 is 24030993.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399030421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3325194 + ... + 3325313.

It is an arithmetic number, because the mean of its divisors is an integer number (46553556).

Almost surely, 2^399030420 is an apocalyptic number.

399030420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

399030420 is an abundant number, since it is smaller than the sum of its proper divisors (718254924).

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

399030420 is a wasteful number, since it uses less digits than its factorization.

399030420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6650519 (or 6650517 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 399030420 is about 19975.7457933365. The cubic root of 399030420 is about 736.2104908547.

The spelling of 399030420 in words is "three hundred ninety-nine million, thirty thousand, four hundred twenty".