33128404 has 24 divisors (see below), whose sum is σ = 59941728. Its totient is φ = 16010400.

The previous prime is 33128399. The next prime is 33128423. The reversal of 33128404 is 40482133.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16419 + ... + 18325.

It is an arithmetic number, because the mean of its divisors is an integer number (2497572).

Almost surely, 2^33128404 is an apocalyptic number.

It is an amenable number.

33128404 is a deficient number, since it is larger than the sum of its proper divisors (26813324).

33128404 is a wasteful number, since it uses less digits than its factorization.

33128404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055 (or 2053 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 33128404 is about 5755.7279296367. The cubic root of 33128404 is about 321.1689150228.

The spelling of 33128404 in words is "thirty-three million, one hundred twenty-eight thousand, four hundred four".