28742703885 has 24 divisors (see below), whose sum is σ = 56937928320. Its totient is φ = 13139521632.

The previous prime is 28742703863. The next prime is 28742703901. The reversal of 28742703885 is 58830724782.

It is not a de Polignac number, because 28742703885 - 2⁸ = 28742703629 is a prime.

It is a super-2 number, since 2×28742703885² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45623025 + ... + 45623654.

It is an arithmetic number, because the mean of its divisors is an integer number (2372413680).

Almost surely, 2^28742703885 is an apocalyptic number.

It is an amenable number.

28742703885 is a deficient number, since it is larger than the sum of its proper divisors (28195224435).

28742703885 is a wasteful number, since it uses less digits than its factorization.

28742703885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91246697 (or 91246694 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 54.

The spelling of 28742703885 in words is "twenty-eight billion, seven hundred forty-two million, seven hundred three thousand, eight hundred eighty-five".