28880188 has 12 divisors (see below), whose sum is σ = 51180640. Its totient is φ = 14257152.

The previous prime is 28880183. The next prime is 28880213. The reversal of 28880188 is 88108882.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28880183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45381 + ... + 46012.

Almost surely, 2^28880188 is an apocalyptic number.

It is an amenable number.

28880188 is a deficient number, since it is larger than the sum of its proper divisors (22300452).

28880188 is a wasteful number, since it uses less digits than its factorization.

28880188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91476 (or 91474 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 43.

The square root of 28880188 is about 5374.0290285781. The cubic root of 28880188 is about 306.8079946151.

The spelling of 28880188 in words is "twenty-eight million, eight hundred eighty thousand, one hundred eighty-eight".