28103782880 has 24 divisors (see below), whose sum is σ = 66395187432. Its totient is φ = 11241513088.

The previous prime is 28103782867. The next prime is 28103782891. The reversal of 28103782880 is 8828730182.

It is a super-2 number, since 2×28103782880² (a number of 22 digits) contains 22 as substring.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 87824162 + ... + 87824481.

It is an arithmetic number, because the mean of its divisors is an integer number (2766466143).

Almost surely, 2^28103782880 is an apocalyptic number.

28103782880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28103782880 is an abundant number, since it is smaller than the sum of its proper divisors (38291404552).

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

28103782880 is a wasteful number, since it uses less digits than its factorization.

28103782880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175648658 (or 175648650 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 47.

The spelling of 28103782880 in words is "twenty-eight billion, one hundred three million, seven hundred eighty-two thousand, eight hundred eighty".