28225071 has 64 divisors (see below), whose sum is σ = 51363840. Its totient is φ = 14968800.

The previous prime is 28225039. The next prime is 28225073. The reversal of 28225071 is 17052282.

It is not a de Polignac number, because 28225071 - 2⁵ = 28225039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28225073) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 186846 + ... + 186996.

It is an arithmetic number, because the mean of its divisors is an integer number (802560).

Almost surely, 2^28225071 is an apocalyptic number.

28225071 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28225071 is a deficient number, since it is larger than the sum of its proper divisors (23138769).

28225071 is a wasteful number, since it uses less digits than its factorization.

28225071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 28225071 is about 5312.7272657271. The cubic root of 28225071 is about 304.4703555309.

The spelling of 28225071 in words is "twenty-eight million, two hundred twenty-five thousand, seventy-one".