28385250 has 32 divisors (see below), whose sum is σ = 70851456. Its totient is φ = 7569200.

The previous prime is 28385249. The next prime is 28385251. The reversal of 28385250 is 5258382.

It is an interprime number because it is at equal distance from previous prime (28385249) and next prime (28385251).

It is not an unprimeable number, because it can be changed into a prime (28385251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18174 + ... + 19673.

It is an arithmetic number, because the mean of its divisors is an integer number (2214108).

Almost surely, 2^28385250 is an apocalyptic number.

28385250 is an abundant number, since it is smaller than the sum of its proper divisors (42466206).

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

28385250 is a wasteful number, since it uses less digits than its factorization.

28385250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37867 (or 37857 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 28385250 is about 5327.7809639661. The cubic root of 28385250 is about 305.0452320268.

The spelling of 28385250 in words is "twenty-eight million, three hundred eighty-five thousand, two hundred fifty".