399285460 has 96 divisors (see below), whose sum is σ = 1023418368. Its totient is φ = 127733760.

The previous prime is 399285431. The next prime is 399285461. The reversal of 399285460 is 64582993.

It is a self number, because there is not a number n which added to its sum of digits gives 399285460.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399285461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 301600 + ... + 302920.

It is an arithmetic number, because the mean of its divisors is an integer number (10660608).

Almost surely, 2^399285460 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399285460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (511709184).

399285460 is an abundant number, since it is smaller than the sum of its proper divisors (624132908).

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

399285460 is a wasteful number, since it uses less digits than its factorization.

399285460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481 (or 1479 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 399285460 is about 19982.1285152508. The cubic root of 399285460 is about 736.3673069148.

The spelling of 399285460 in words is "three hundred ninety-nine million, two hundred eighty-five thousand, four hundred sixty".