28889136 has 50 divisors (see below), whose sum is σ = 83617292. Its totient is φ = 9629280.

The previous prime is 28889129. The next prime is 28889141. The reversal of 28889136 is 63198882.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 28889091 and 28889100.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9850 + ... + 12441.

Almost surely, 2^28889136 is an apocalyptic number.

It is an amenable number.

28889136 is an abundant number, since it is smaller than the sum of its proper divisors (54728156).

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

28889136 is a wasteful number, since it uses less digits than its factorization.

28889136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22311 (or 22296 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 28889136 is about 5374.8614865874. The cubic root of 28889136 is about 306.8396776320.

The spelling of 28889136 in words is "twenty-eight million, eight hundred eighty-nine thousand, one hundred thirty-six".