409123432 has 8 divisors (see below), whose sum is σ = 767106450. Its totient is φ = 204561712.

The previous prime is 409123397. The next prime is 409123433. The reversal of 409123432 is 234321904.

It can be written as a sum of positive squares in only one way, i.e., 403768836 + 5354596 = 20094^2 + 2314^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×409123432² = 334763965222917248, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 409123432.

It is not an unprimeable number, because it can be changed into a prime (409123433) by changing a digit.

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 as a sum of consecutive naturals, namely, 25570207 + ... + 25570222.

Almost surely, 2^409123432 is an apocalyptic number.

It is an amenable number.

409123432 is a deficient number, since it is larger than the sum of its proper divisors (357983018).

409123432 is a wasteful number, since it uses less digits than its factorization.

409123432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51140435 (or 51140431 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 409123432 is about 20226.7998457492. The cubic root of 409123432 is about 742.3660765083.

It can be divided in two parts, 40912 and 3432, that added together give a palindrome (44344).

The spelling of 409123432 in words is "four hundred nine million, one hundred twenty-three thousand, four hundred thirty-two".