28904090 has 16 divisors (see below), whose sum is σ = 53706240. Its totient is φ = 11188560.

The previous prime is 28904089. The next prime is 28904093. The reversal of 28904090 is 9040982.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28904093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46310 + ... + 46929.

It is an arithmetic number, because the mean of its divisors is an integer number (3356640).

Almost surely, 2^28904090 is an apocalyptic number.

28904090 is a deficient number, since it is larger than the sum of its proper divisors (24802150).

28904090 is a wasteful number, since it uses less digits than its factorization.

28904090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93277.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 28904090 is about 5376.2524122292. The cubic root of 28904090 is about 306.8926120529.

The spelling of 28904090 in words is "twenty-eight million, nine hundred four thousand, ninety".