28245270 has 16 divisors (see below), whose sum is σ = 67788720. Its totient is φ = 7532064.

The previous prime is 28245263. The next prime is 28245289. The reversal of 28245270 is 7254282.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 941509 = 28245270 / (2 + 8 + 2 + 4 + 5 + 2 + 7 + 0).

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, 470725 + ... + 470784.

It is an arithmetic number, because the mean of its divisors is an integer number (4236795).

Almost surely, 2^28245270 is an apocalyptic number.

28245270 is an abundant number, since it is smaller than the sum of its proper divisors (39543450).

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

28245270 is a wasteful number, since it uses less digits than its factorization.

28245270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941519.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 28245270 is about 5314.6279267697. The cubic root of 28245270 is about 304.5429686371.

The spelling of 28245270 in words is "twenty-eight million, two hundred forty-five thousand, two hundred seventy".