400424022 has 12 divisors (see below), whose sum is σ = 867585420. Its totient is φ = 133474668.

The previous prime is 400423979. The next prime is 400424023. The reversal of 400424022 is 220424004.

400424022 is a `hidden beast` number, since 400 + 4 + 240 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 22245779 = 400424022 / (4 + 0 + 0 + 4 + 2 + 4 + 0 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 400423986 and 400424004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400424023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11122872 + ... + 11122907.

It is an arithmetic number, because the mean of its divisors is an integer number (72298785).

Almost surely, 2^400424022 is an apocalyptic number.

400424022 is an abundant number, since it is smaller than the sum of its proper divisors (467161398).

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

400424022 is a wasteful number, since it uses less digits than its factorization.

400424022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22245787 (or 22245784 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 400424022 is about 20010.5977421965. The cubic root of 400424022 is about 737.0665595205.

Subtracting from 400424022 its sum of digits (18), we obtain a palindrome (400424004).

Adding to 400424022 its reverse (220424004), we get a palindrome (620848026).

The spelling of 400424022 in words is "four hundred million, four hundred twenty-four thousand, twenty-two".