28007250 has 64 divisors (see below), whose sum is σ = 70761600. Its totient is φ = 7377600.

The previous prime is 28007227. The next prime is 28007269. The reversal of 28007250 is 5270082.

It is a self number, because there is not a number n which added to its sum of digits gives 28007250.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80076 + ... + 80424.

It is an arithmetic number, because the mean of its divisors is an integer number (1105650).

Almost surely, 2^28007250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28007250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35380800).

28007250 is an abundant number, since it is smaller than the sum of its proper divisors (42754350).

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

28007250 is a wasteful number, since it uses less digits than its factorization.

28007250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 28007250 is about 5292.1876383968. The cubic root of 28007250 is about 303.6851035807.

The spelling of 28007250 in words is "twenty-eight million, seven thousand, two hundred fifty".