28406761225 has 48 divisors (see below), whose sum is σ = 37611307008. Its totient is φ = 21233298240.

The previous prime is 28406761219. The next prime is 28406761283. The reversal of 28406761225 is 52216760482.

It is a happy number.

It is not a de Polignac number, because 28406761225 - 2⁵ = 28406761193 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 47 ways as a sum of consecutive naturals, for example, 26132632 + ... + 26133718.

It is an arithmetic number, because the mean of its divisors is an integer number (783568896).

Almost surely, 2^28406761225 is an apocalyptic number.

28406761225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28406761225 is a deficient number, since it is larger than the sum of its proper divisors (9204545783).

28406761225 is a wasteful number, since it uses less digits than its factorization.

28406761225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134 (or 2129 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 28406761225 in words is "twenty-eight billion, four hundred six million, seven hundred sixty-one thousand, two hundred twenty-five".