405090909432 has 128 divisors (see below), whose sum is σ = 1256096160000. Its totient is φ = 119900027520.

The previous prime is 405090909413. The next prime is 405090909437. The reversal of 405090909432 is 234909090504.

It is a happy number.

405090909432 is a `hidden beast` number, since 40 + 5 + 0 + 90 + 90 + 9 + 432 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405090909437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1880307 + ... + 2084642.

It is an arithmetic number, because the mean of its divisors is an integer number (9813251250).

Almost surely, 2^405090909432 is an apocalyptic number.

It is an amenable number.

405090909432 is an abundant number, since it is smaller than the sum of its proper divisors (851005250568).

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

405090909432 is a wasteful number, since it uses less digits than its factorization.

405090909432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3965018 (or 3965008 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

Adding to 405090909432 its reverse (234909090504), we get a palindrome (639999999936).

The spelling of 405090909432 in words is "four hundred five billion, ninety million, nine hundred nine thousand, four hundred thirty-two".