28905088 has 16 divisors (see below), whose sum is σ = 57584610. Its totient is φ = 14452480.

The previous prime is 28905059. The next prime is 28905133. The reversal of 28905088 is 88050982.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15303744 + 13601344 = 3912^2 + 3688^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×28905088² = 1671008224575488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28905088.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112783 + ... + 113038.

Almost surely, 2^28905088 is an apocalyptic number.

It is an amenable number.

28905088 is a deficient number, since it is larger than the sum of its proper divisors (28679522).

28905088 is an equidigital number, since it uses as much as digits as its factorization.

28905088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225835 (or 225823 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 28905088 is about 5376.3452270106. The cubic root of 28905088 is about 306.8961441401.

The spelling of 28905088 in words is "twenty-eight million, nine hundred five thousand, eighty-eight".