28225719 has 8 divisors (see below), whose sum is σ = 41815920. Its totient is φ = 18817128.

The previous prime is 28225667. The next prime is 28225721. The reversal of 28225719 is 91752282.

28225719 is a `hidden beast` number, since 2 + 82 + 2 + 571 + 9 = 666.

It is not a de Polignac number, because 28225719 - 2⁷ = 28225591 is a prime.

It is a super-2 number, since 2×28225719² = 1593382426133922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28225019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 522672 + ... + 522725.

It is an arithmetic number, because the mean of its divisors is an integer number (5226990).

Almost surely, 2^28225719 is an apocalyptic number.

28225719 is a deficient number, since it is larger than the sum of its proper divisors (13590201).

28225719 is a wasteful number, since it uses less digits than its factorization.

28225719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045406 (or 1045400 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 28225719 is about 5312.7882510034. The cubic root of 28225719 is about 304.4726855549.

The spelling of 28225719 in words is "twenty-eight million, two hundred twenty-five thousand, seven hundred nineteen".