28743117388 has 24 divisors (see below), whose sum is σ = 55249931520. Its totient is φ = 13023196560.

The previous prime is 28743117371. The next prime is 28743117433. The reversal of 28743117388 is 88371134782.

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, 8219968 + ... + 8223463.

It is an arithmetic number, because the mean of its divisors is an integer number (2302080480).

Almost surely, 2^28743117388 is an apocalyptic number.

It is an amenable number.

28743117388 is a deficient number, since it is larger than the sum of its proper divisors (26506814132).

28743117388 is a wasteful number, since it uses less digits than its factorization.

28743117388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16443477 (or 16443475 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 52.

The spelling of 28743117388 in words is "twenty-eight billion, seven hundred forty-three million, one hundred seventeen thousand, three hundred eighty-eight".