28005888 has 40 divisors (see below), whose sum is σ = 74613528. Its totient is φ = 9334784.

The previous prime is 28005877. The next prime is 28005907. The reversal of 28005888 is 88850082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7581 + ... + 10652.

Almost surely, 2^28005888 is an apocalyptic number.

It is an amenable number.

28005888 is an abundant number, since it is smaller than the sum of its proper divisors (46607640).

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

28005888 is an equidigital number, since it uses as much as digits as its factorization.

28005888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18254 (or 18238 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 39.

The square root of 28005888 is about 5292.0589565877. The cubic root of 28005888 is about 303.6801807385.

The spelling of 28005888 in words is "twenty-eight million, five thousand, eight hundred eighty-eight".