28873188 has 36 divisors (see below), whose sum is σ = 76160448. Its totient is φ = 9205680.

The previous prime is 28873151. The next prime is 28873189. The reversal of 28873188 is 88137882.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (28873189) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16608 + ... + 18263.

It is an arithmetic number, because the mean of its divisors is an integer number (2115568).

Almost surely, 2^28873188 is an apocalyptic number.

It is an amenable number.

28873188 is an abundant number, since it is smaller than the sum of its proper divisors (47287260).

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

28873188 is a wasteful number, since it uses less digits than its factorization.

28873188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34904 (or 34899 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 28873188 is about 5373.3777086671. The cubic root of 28873188 is about 306.7832045006.

The spelling of 28873188 in words is "twenty-eight million, eight hundred seventy-three thousand, one hundred eighty-eight".