28108134502 has 32 divisors (see below), whose sum is σ = 49498920000. Its totient is φ = 11965451904.

The previous prime is 28108134491. The next prime is 28108134503. The reversal of 28108134502 is 20543180182.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28108134503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35283 + ... + 239710.

It is an arithmetic number, because the mean of its divisors is an integer number (1546841250).

Almost surely, 2^28108134502 is an apocalyptic number.

28108134502 is a deficient number, since it is larger than the sum of its proper divisors (21390785498).

28108134502 is a wasteful number, since it uses less digits than its factorization.

28108134502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275165 (or 275151 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The spelling of 28108134502 in words is "twenty-eight billion, one hundred eight million, one hundred thirty-four thousand, five hundred two".