28617153880 has 32 divisors (see below), whose sum is σ = 73586967840. Its totient is φ = 9811595520.

The previous prime is 28617153871. The next prime is 28617153893. The reversal of 28617153880 is 8835171682.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51101781 + ... + 51102340.

It is an arithmetic number, because the mean of its divisors is an integer number (2299592745).

Almost surely, 2^28617153880 is an apocalyptic number.

28617153880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28617153880 is an abundant number, since it is smaller than the sum of its proper divisors (44969813960).

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

28617153880 is a wasteful number, since it uses less digits than its factorization.

28617153880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102204139 (or 102204135 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 28617153880 in words is "twenty-eight billion, six hundred seventeen million, one hundred fifty-three thousand, eight hundred eighty".