400860216 has 24 divisors (see below), whose sum is σ = 1085663280. Its totient is φ = 133620048.

The previous prime is 400860209. The next prime is 400860277. The reversal of 400860216 is 612068004.

400860216 is a `hidden beast` number, since 40 + 0 + 8 + 602 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 400860216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2783680 + ... + 2783823.

It is an arithmetic number, because the mean of its divisors is an integer number (45235970).

Almost surely, 2^400860216 is an apocalyptic number.

It is an amenable number.

400860216 is an abundant number, since it is smaller than the sum of its proper divisors (684803064).

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

400860216 is a wasteful number, since it uses less digits than its factorization.

400860216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5567515 (or 5567508 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 400860216 is about 20021.4938503599. The cubic root of 400860216 is about 737.3340986977.

The spelling of 400860216 in words is "four hundred million, eight hundred sixty thousand, two hundred sixteen".