399546460 has 24 divisors (see below), whose sum is σ = 851573520. Its totient is φ = 157432704.

The previous prime is 399546451. The next prime is 399546503. The reversal of 399546460 is 64645993.

It is a self number, because there is not a number n which added to its sum of digits gives 399546460.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147745 + ... + 150424.

It is an arithmetic number, because the mean of its divisors is an integer number (35482230).

Almost surely, 2^399546460 is an apocalyptic number.

It is an amenable number.

399546460 is an abundant number, since it is smaller than the sum of its proper divisors (452027060).

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

399546460 is a wasteful number, since it uses less digits than its factorization.

399546460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298245 (or 298243 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 46.

The square root of 399546460 is about 19988.6582841370. The cubic root of 399546460 is about 736.5277184708.

The spelling of 399546460 in words is "three hundred ninety-nine million, five hundred forty-six thousand, four hundred sixty".