28888805 has 32 divisors (see below), whose sum is σ = 40497408. Its totient is φ = 19571200.

The previous prime is 28888771. The next prime is 28888841. The reversal of 28888805 is 50888882.

It is not a de Polignac number, because 28888805 - 2⁸ = 28888549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28888805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51587 + ... + 52143.

It is an arithmetic number, because the mean of its divisors is an integer number (1265544).

Almost surely, 2^28888805 is an apocalyptic number.

It is an amenable number.

28888805 is a deficient number, since it is larger than the sum of its proper divisors (11608603).

28888805 is a wasteful number, since it uses less digits than its factorization.

28888805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637.

The product of its (nonzero) digits is 327680, while the sum is 47.

The square root of 28888805 is about 5374.8306950080. The cubic root of 28888805 is about 306.8385057460.

The spelling of 28888805 in words is "twenty-eight million, eight hundred eighty-eight thousand, eight hundred five".