408090128 has 10 divisors (see below), whose sum is σ = 790674654. Its totient is φ = 204045056.

The previous prime is 408090103. The next prime is 408090161. The reversal of 408090128 is 821090804.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 222367744 + 185722384 = 14912^2 + 13628^2 .

It is a junction number, because it is equal to n+sod(n) for n = 408090094 and 408090103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12752801 + ... + 12752832.

Almost surely, 2^408090128 is an apocalyptic number.

It is an amenable number.

408090128 is a deficient number, since it is larger than the sum of its proper divisors (382584526).

408090128 is a wasteful number, since it uses less digits than its factorization.

408090128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25505641 (or 25505635 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 408090128 is about 20201.2407539735. The cubic root of 408090128 is about 741.7405631262.

The spelling of 408090128 in words is "four hundred eight million, ninety thousand, one hundred twenty-eight".