28888136 has 16 divisors (see below), whose sum is σ = 55054140. Its totient is φ = 14207040.

The previous prime is 28888129. The next prime is 28888141. The reversal of 28888136 is 63188882.

It can be written as a sum of positive squares in 2 ways, for example, as 25300900 + 3587236 = 5030^2 + 1894^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29111 + ... + 30086.

Almost surely, 2^28888136 is an apocalyptic number.

It is an amenable number.

28888136 is a deficient number, since it is larger than the sum of its proper divisors (26166004).

28888136 is a wasteful number, since it uses less digits than its factorization.

28888136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59264 (or 59260 counting only the distinct ones).

The product of its digits is 147456, while the sum is 44.

The square root of 28888136 is about 5374.7684601292. The cubic root of 28888136 is about 306.8361371636.

The spelling of 28888136 in words is "twenty-eight million, eight hundred eighty-eight thousand, one hundred thirty-six".