28005057880 has 32 divisors (see below), whose sum is σ = 63030441600. Its totient is φ = 11198634496.

The previous prime is 28005057863. The next prime is 28005057953. The reversal of 28005057880 is 8875050082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30144 + ... + 238576.

It is an arithmetic number, because the mean of its divisors is an integer number (1969701300).

Almost surely, 2^28005057880 is an apocalyptic number.

28005057880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28005057880 is an abundant number, since it is smaller than the sum of its proper divisors (35025383720).

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

28005057880 is a wasteful number, since it uses less digits than its factorization.

28005057880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211803 (or 211799 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 43.

The spelling of 28005057880 in words is "twenty-eight billion, five million, fifty-seven thousand, eight hundred eighty".