400205022 has 32 divisors (see below), whose sum is σ = 918604800. Its totient is φ = 113863008.

The previous prime is 400205011. The next prime is 400205023. The reversal of 400205022 is 220502004.

It is a junction number, because it is equal to n+sod(n) for n = 400204992 and 400205010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400205023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9897 + ... + 29972.

It is an arithmetic number, because the mean of its divisors is an integer number (28706400).

Almost surely, 2^400205022 is an apocalyptic number.

400205022 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

400205022 is an abundant number, since it is smaller than the sum of its proper divisors (518399778).

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

400205022 is a wasteful number, since it uses less digits than its factorization.

400205022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40120.

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 400205022 is about 20005.1248933867. The cubic root of 400205022 is about 736.9321628109.

Adding to 400205022 its reverse (220502004), we get a palindrome (620707026).

The spelling of 400205022 in words is "four hundred million, two hundred five thousand, twenty-two".