400605460 has 12 divisors (see below), whose sum is σ = 841271508. Its totient is φ = 160242176.

The previous prime is 400605409. The next prime is 400605503. The reversal of 400605460 is 64506004.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 137452176 + 263153284 = 11724^2 + 16222^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10015117 + ... + 10015156.

It is an arithmetic number, because the mean of its divisors is an integer number (70105959).

Almost surely, 2^400605460 is an apocalyptic number.

It is an amenable number.

400605460 is an abundant number, since it is smaller than the sum of its proper divisors (440666048).

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

400605460 is a wasteful number, since it uses less digits than its factorization.

400605460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20030282 (or 20030280 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 400605460 is about 20015.1307764901. The cubic root of 400605460 is about 737.1778679349.

The spelling of 400605460 in words is "four hundred million, six hundred five thousand, four hundred sixty".