28022553 has 12 divisors (see below), whose sum is σ = 43590820. Its totient is φ = 17244576.

The previous prime is 28022521. The next prime is 28022563. The reversal of 28022553 is 35522082.

It can be written as a sum of positive squares in 2 ways, for example, as 13483584 + 14538969 = 3672^2 + 3813^2 .

It is not a de Polignac number, because 28022553 - 2⁵ = 28022521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28022503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119638 + ... + 119871.

Almost surely, 2^28022553 is an apocalyptic number.

It is an amenable number.

28022553 is a deficient number, since it is larger than the sum of its proper divisors (15568267).

28022553 is a wasteful number, since it uses less digits than its factorization.

28022553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239528 (or 239525 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 28022553 is about 5293.6332513690. The cubic root of 28022553 is about 303.7404041068.

The spelling of 28022553 in words is "twenty-eight million, twenty-two thousand, five hundred fifty-three".