28422386500225 has 9 divisors (see below), whose sum is σ = 35243792314153. Its totient is φ = 22737887875120.

The previous prime is 28422386500171. The next prime is 28422386500279. The reversal of 28422386500225 is 52200568322482.

The square root of 28422386500225 is 5331265.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (28422386500171) and next prime (28422386500279).

It can be written as a sum of positive squares in 4 ways, for example, as 2592979134529 + 25829407365696 = 1610273^2 + 5082264^2 .

It is not a de Polignac number, because 28422386500225 - 2⁹ = 28422386499713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 26123199 + ... + 27189451.

Almost surely, 2^{28422386500225} is an apocalyptic number.

28422386500225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28422386500225 is the 5331265-th square number.

28422386500225 is the 2665633-rd centered octagonal number.

It is an amenable number.

28422386500225 is a deficient number, since it is larger than the sum of its proper divisors (6821405813928).

28422386500225 is an frugal number, since it uses more digits than its factorization.

28422386500225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132516 (or 1066258 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 49.

The spelling of 28422386500225 in words is "twenty-eight trillion, four hundred twenty-two billion, three hundred eighty-six million, five hundred thousand, two hundred twenty-five".