28222523 has 12 divisors (see below), whose sum is σ = 32684880. Its totient is φ = 23871936.

The previous prime is 28222517. The next prime is 28222529. The reversal of 28222523 is 32522282.

It is an interprime number because it is at equal distance from previous prime (28222517) and next prime (28222529).

It is not a de Polignac number, because 28222523 - 2⁶ = 28222459 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28222492 and 28222501.

It is not an unprimeable number, because it can be changed into a prime (28222529) 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, 55193 + ... + 55701.

It is an arithmetic number, because the mean of its divisors is an integer number (2723740).

Almost surely, 2^28222523 is an apocalyptic number.

28222523 is a deficient number, since it is larger than the sum of its proper divisors (4462357).

28222523 is an frugal number, since it uses more digits than its factorization.

28222523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694 (or 605 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 28222523 is about 5312.4874588087. The cubic root of 28222523 is about 304.4611933005.

The spelling of 28222523 in words is "twenty-eight million, two hundred twenty-two thousand, five hundred twenty-three".