400022604 has 48 divisors (see below), whose sum is σ = 1048773600. Its totient is φ = 131839488.

The previous prime is 400022587. The next prime is 400022621. The reversal of 400022604 is 406220004.

400022604 is a `hidden beast` number, since 40 + 0 + 0 + 22 + 604 = 666.

It is an interprime number because it is at equal distance from previous prime (400022587) and next prime (400022621).

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 11197 + ... + 30420.

It is an arithmetic number, because the mean of its divisors is an integer number (21849450).

Almost surely, 2^400022604 is an apocalyptic number.

It is an amenable number.

400022604 is an abundant number, since it is smaller than the sum of its proper divisors (648750996).

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

400022604 is a wasteful number, since it uses less digits than its factorization.

400022604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41719 (or 41711 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 400022604 is about 20000.5650920168. The cubic root of 400022604 is about 736.8201784413.

Adding to 400022604 its reverse (406220004), we get a palindrome (806242608).

The spelling of 400022604 in words is "four hundred million, twenty-two thousand, six hundred four".