28787750 has 16 divisors (see below), whose sum is σ = 53891136. Its totient is φ = 11515000.

The previous prime is 28787741. The next prime is 28787761. The reversal of 28787750 is 5778782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57326 + ... + 57825.

It is an arithmetic number, because the mean of its divisors is an integer number (3368196).

Almost surely, 2^28787750 is an apocalyptic number.

28787750 is a deficient number, since it is larger than the sum of its proper divisors (25103386).

28787750 is a wasteful number, since it uses less digits than its factorization.

28787750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115168 (or 115158 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 44.

The square root of 28787750 is about 5365.4216982452. The cubic root of 28787750 is about 306.4803071157.

The spelling of 28787750 in words is "twenty-eight million, seven hundred eighty-seven thousand, seven hundred fifty".