28888730 has 32 divisors (see below), whose sum is σ = 56246400. Its totient is φ = 10619712.

The previous prime is 28888681. The next prime is 28888747. The reversal of 28888730 is 3788882.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46361 + ... + 46979.

It is an arithmetic number, because the mean of its divisors is an integer number (1757700).

Almost surely, 2^28888730 is an apocalyptic number.

28888730 is a deficient number, since it is larger than the sum of its proper divisors (27357670).

28888730 is a wasteful number, since it uses less digits than its factorization.

28888730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998.

The product of its (nonzero) digits is 172032, while the sum is 44.

The square root of 28888730 is about 5374.8237180395. The cubic root of 28888730 is about 306.8382402117.

The spelling of 28888730 in words is "twenty-eight million, eight hundred eighty-eight thousand, seven hundred thirty".