405432128 has 14 divisors (see below), whose sum is σ = 804529506. Its totient is φ = 202716032.

The previous prime is 405432103. The next prime is 405432143. The reversal of 405432128 is 821234504.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 324288064 + 81144064 = 18008^2 + 9008^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 405432128.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 3167375 + ... + 3167502.

Almost surely, 2^405432128 is an apocalyptic number.

It is an amenable number.

405432128 is a deficient number, since it is larger than the sum of its proper divisors (399097378).

405432128 is an equidigital number, since it uses as much as digits as its factorization.

405432128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6334889 (or 6334879 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 405432128 is about 20135.3452416391. The cubic root of 405432128 is about 740.1266693315.

The spelling of 405432128 in words is "four hundred five million, four hundred thirty-two thousand, one hundred twenty-eight".