399030480 has 60 divisors (see below), whose sum is σ = 1340079780. Its totient is φ = 106407936.

The previous prime is 399030469. The next prime is 399030487. The reversal of 399030480 is 84030993.

It can be written as a sum of positive squares in 2 ways, for example, as 160883856 + 238146624 = 12684^2 + 15432^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399030487) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 276385 + ... + 277824.

It is an arithmetic number, because the mean of its divisors is an integer number (22334663).

Almost surely, 2^399030480 is an apocalyptic number.

399030480 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

399030480 is an abundant number, since it is smaller than the sum of its proper divisors (941049300).

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

399030480 is a wasteful number, since it uses less digits than its factorization.

399030480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554228 (or 554219 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 399030480 is about 19975.7472951577. The cubic root of 399030480 is about 736.2105277547.

The spelling of 399030480 in words is "three hundred ninety-nine million, thirty thousand, four hundred eighty".