405440022 has 32 divisors (see below), whose sum is σ = 879943680. Its totient is φ = 123795360.

The previous prime is 405440017. The next prime is 405440023. The reversal of 405440022 is 220044504.

It is a super-2 number, since 2×405440022² = 328763222878720968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405440023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9622 + ... + 30057.

It is an arithmetic number, because the mean of its divisors is an integer number (27498240).

Almost surely, 2^405440022 is an apocalyptic number.

405440022 is an abundant number, since it is smaller than the sum of its proper divisors (474503658).

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

405440022 is a wasteful number, since it uses less digits than its factorization.

405440022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39828.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 405440022 is about 20135.5412641429. The cubic root of 405440022 is about 740.1314728663.

Adding to 405440022 its reverse (220044504), we get a palindrome (625484526).

The spelling of 405440022 in words is "four hundred five million, four hundred forty thousand, twenty-two".