405532381440 has 72 divisors (see below), whose sum is σ = 1295169055488. Its totient is φ = 108141967360.

The previous prime is 405532381411. The next prime is 405532381459. The reversal of 405532381440 is 44183235504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52799856 + ... + 52807535.

It is an arithmetic number, because the mean of its divisors is an integer number (17988459104).

Almost surely, 2^405532381440 is an apocalyptic number.

405532381440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

405532381440 is an abundant number, since it is smaller than the sum of its proper divisors (889636674048).

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

405532381440 is a wasteful number, since it uses less digits than its factorization.

405532381440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105607415 (or 105607401 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 39.

The spelling of 405532381440 in words is "four hundred five billion, five hundred thirty-two million, three hundred eighty-one thousand, four hundred forty".