28243629880 has 16 divisors (see below), whose sum is σ = 63548167320. Its totient is φ = 11297451936.

The previous prime is 28243629871. The next prime is 28243629893. The reversal of 28243629880 is 8892634282.

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 3 ways as a sum of consecutive naturals, for example, 353045334 + ... + 353045413.

Almost surely, 2^28243629880 is an apocalyptic number.

28243629880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28243629880 is an abundant number, since it is smaller than the sum of its proper divisors (35304537440).

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

28243629880 is a wasteful number, since it uses less digits than its factorization.

28243629880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706090758 (or 706090754 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 52.

The spelling of 28243629880 in words is "twenty-eight billion, two hundred forty-three million, six hundred twenty-nine thousand, eight hundred eighty".