28826388 has 48 divisors (see below), whose sum is σ = 75600000. Its totient is φ = 9497664.

The previous prime is 28826351. The next prime is 28826393. The reversal of 28826388 is 88362882.

28826388 is a `hidden beast` number, since 2 + 8 + 8 + 2 + 638 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8113 + ... + 11111.

It is an arithmetic number, because the mean of its divisors is an integer number (1575000).

Almost surely, 2^28826388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28826388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37800000).

28826388 is an abundant number, since it is smaller than the sum of its proper divisors (46773612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28826388 is a wasteful number, since it uses less digits than its factorization.

28826388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3101 (or 3093 counting only the distinct ones).

The product of its digits is 294912, while the sum is 45.

The square root of 28826388 is about 5369.0211398355. The cubic root of 28826388 is about 306.6173618486.

The spelling of 28826388 in words is "twenty-eight million, eight hundred twenty-six thousand, three hundred eighty-eight".