400205460 has 48 divisors (see below), whose sum is σ = 1125423936. Its totient is φ = 106259712.

The previous prime is 400205459. The next prime is 400205471. The reversal of 400205460 is 64502004.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 334 + ... + 28293.

It is an arithmetic number, because the mean of its divisors is an integer number (23446332).

Almost surely, 2^400205460 is an apocalyptic number.

It is an amenable number.

400205460 is an abundant number, since it is smaller than the sum of its proper divisors (725218476).

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

400205460 is a wasteful number, since it uses less digits than its factorization.

400205460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28872 (or 28870 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 400205460 is about 20005.1358405785. The cubic root of 400205460 is about 736.9324316533.

Adding to 400205460 its reverse (64502004), we get a palindrome (464707464).

The spelling of 400205460 in words is "four hundred million, two hundred five thousand, four hundred sixty".