28258750 has 80 divisors (see below), whose sum is σ = 59830848. Its totient is φ = 9936000.

The previous prime is 28258729. The next prime is 28258753. The reversal of 28258750 is 5785282.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28258753) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 601227 + ... + 601273.

Almost surely, 2^28258750 is an apocalyptic number.

28258750 is an abundant number, since it is smaller than the sum of its proper divisors (31572098).

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

28258750 is a wasteful number, since it uses less digits than its factorization.

28258750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 28258750 is about 5315.8959733990. The cubic root of 28258750 is about 304.5914084445.

The spelling of 28258750 in words is "twenty-eight million, two hundred fifty-eight thousand, seven hundred fifty".