400022216 has 32 divisors (see below), whose sum is σ = 826346880. Its totient is φ = 180024000.

The previous prime is 400022213. The next prime is 400022221. The reversal of 400022216 is 612220004.

It is a junction number, because it is equal to n+sod(n) for n = 400022194 and 400022203.

It is not an unprimeable number, because it can be changed into a prime (400022213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13616 + ... + 31391.

It is an arithmetic number, because the mean of its divisors is an integer number (25823340).

Almost surely, 2^400022216 is an apocalyptic number.

It is an amenable number.

400022216 is an abundant number, since it is smaller than the sum of its proper divisors (426324664).

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

400022216 is a wasteful number, since it uses less digits than its factorization.

400022216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45125 (or 45121 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 400022216 is about 20000.5553922885. Note that the first 3 decimals coincide. The cubic root of 400022216 is about 736.8199402162.

The spelling of 400022216 in words is "four hundred million, twenty-two thousand, two hundred sixteen".