28445880267 has 160 divisors (see below), whose sum is σ = 53568345600. Its totient is φ = 14675738112.

The previous prime is 28445880167. The next prime is 28445880277. The reversal of 28445880267 is 76208854482.

It is not a de Polignac number, because 28445880267 - 2⁸ = 28445880011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28445880277) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 25930063 + ... + 25931159.

It is an arithmetic number, because the mean of its divisors is an integer number (334802160).

Almost surely, 2^28445880267 is an apocalyptic number.

28445880267 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28445880267 is a deficient number, since it is larger than the sum of its proper divisors (25122465333).

28445880267 is a wasteful number, since it uses less digits than its factorization.

28445880267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247 (or 1238 counting only the distinct ones).

The product of its (nonzero) digits is 6881280, while the sum is 54.

The spelling of 28445880267 in words is "twenty-eight billion, four hundred forty-five million, eight hundred eighty thousand, two hundred sixty-seven".