28081626620 has 12 divisors (see below), whose sum is σ = 58971415944. Its totient is φ = 11232650640.

The previous prime is 28081626611. The next prime is 28081626623. The reversal of 28081626620 is 2662618082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28081626623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702040646 + ... + 702040685.

It is an arithmetic number, because the mean of its divisors is an integer number (4914284662).

Almost surely, 2^28081626620 is an apocalyptic number.

28081626620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28081626620 is an abundant number, since it is smaller than the sum of its proper divisors (30889789324).

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

28081626620 is a wasteful number, since it uses less digits than its factorization.

28081626620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404081340 (or 1404081338 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 28081626620 in words is "twenty-eight billion, eighty-one million, six hundred twenty-six thousand, six hundred twenty".