405901232 has 40 divisors (see below), whose sum is σ = 867600720. Its totient is φ = 182420480.

The previous prime is 405901229. The next prime is 405901303. The reversal of 405901232 is 232109504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2708 + ... + 28620.

It is an arithmetic number, because the mean of its divisors is an integer number (21690018).

Almost surely, 2^405901232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 405901232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (433800360).

405901232 is an abundant number, since it is smaller than the sum of its proper divisors (461699488).

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

405901232 is a wasteful number, since it uses less digits than its factorization.

405901232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26021 (or 26015 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 405901232 is about 20146.9906437661. The cubic root of 405901232 is about 740.4120130719.

The spelling of 405901232 in words is "four hundred five million, nine hundred one thousand, two hundred thirty-two".