28904650 has 12 divisors (see below), whose sum is σ = 53762742. Its totient is φ = 11561840.

The previous prime is 28904647. The next prime is 28904717. The reversal of 28904650 is 5640982.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 24295041 + 4609609 = 4929^2 + 2147^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 288997 + ... + 289096.

Almost surely, 2^28904650 is an apocalyptic number.

28904650 is a deficient number, since it is larger than the sum of its proper divisors (24858092).

28904650 is a wasteful number, since it uses less digits than its factorization.

28904650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578105 (or 578100 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 28904650 is about 5376.3044928650. The cubic root of 28904650 is about 306.8945939956.

The spelling of 28904650 in words is "twenty-eight million, nine hundred four thousand, six hundred fifty".