28255502478 has 16 divisors (see below), whose sum is σ = 64584005760. Its totient is φ = 8073000696.

The previous prime is 28255502423. The next prime is 28255502479. The reversal of 28255502478 is 87420555282.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28255502479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336374988 + ... + 336375071.

It is an arithmetic number, because the mean of its divisors is an integer number (4036500360).

Almost surely, 2^28255502478 is an apocalyptic number.

28255502478 is an abundant number, since it is smaller than the sum of its proper divisors (36328503282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28255502478 is a wasteful number, since it uses less digits than its factorization.

28255502478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672750071.

The product of its (nonzero) digits is 1792000, while the sum is 48.

The spelling of 28255502478 in words is "twenty-eight billion, two hundred fifty-five million, five hundred two thousand, four hundred seventy-eight".