22788725 has 6 divisors (see below), whose sum is σ = 28258050. Its totient is φ = 18230960.

The previous prime is 22788713. The next prime is 22788737. The reversal of 22788725 is 52788722.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22788713) and next prime (22788737).

It can be written as a sum of positive squares in 3 ways, for example, as 1203409 + 21585316 = 1097^2 + 4646^2 .

It is not a de Polignac number, because 22788725 - 2⁴ = 22788709 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 455750 + ... + 455799.

It is an arithmetic number, because the mean of its divisors is an integer number (4709675).

Almost surely, 2^22788725 is an apocalyptic number.

22788725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22788725 is a deficient number, since it is larger than the sum of its proper divisors (5469325).

22788725 is an equidigital number, since it uses as much as digits as its factorization.

22788725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911559 (or 911554 counting only the distinct ones).

The product of its digits is 125440, while the sum is 41.

The square root of 22788725 is about 4773.7537640729. The cubic root of 22788725 is about 283.5132383003.

The spelling of 22788725 in words is "twenty-two million, seven hundred eighty-eight thousand, seven hundred twenty-five".