405022440 has 64 divisors (see below), whose sum is σ = 1254274560. Its totient is φ = 104520960.

The previous prime is 405022421. The next prime is 405022451. The reversal of 405022440 is 44220504.

It is an unprimeable number.

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, 50719 + ... + 58158.

It is an arithmetic number, because the mean of its divisors is an integer number (19598040).

Almost surely, 2^405022440 is an apocalyptic number.

405022440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

405022440 is an abundant number, since it is smaller than the sum of its proper divisors (849252120).

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

405022440 is a wasteful number, since it uses less digits than its factorization.

405022440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108922 (or 108918 counting only the distinct ones).

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

The square root of 405022440 is about 20125.1693160579. The cubic root of 405022440 is about 739.8772866885.

Adding to 405022440 its reverse (44220504), we get a palindrome (449242944).

The spelling of 405022440 in words is "four hundred five million, twenty-two thousand, four hundred forty".