28112135538 has 8 divisors (see below), whose sum is σ = 56224271088. Its totient is φ = 9370711844.

The previous prime is 28112135537. The next prime is 28112135551. The reversal of 28112135538 is 83553121182.

It is a sphenic number, since it is the product of 3 distinct primes.

28112135538 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 28112135496 and 28112135505.

It is not an unprimeable number, because it can be changed into a prime (28112135537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2342677956 + ... + 2342677967.

It is an arithmetic number, because the mean of its divisors is an integer number (7028033886).

Almost surely, 2^28112135538 is an apocalyptic number.

28112135538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28112135538 is a wasteful number, since it uses less digits than its factorization.

28112135538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4685355928.

The product of its digits is 57600, while the sum is 39.

It can be divided in two parts, 2811213 and 5538, that added together give a triangular number (2816751 = T₂₃₇₃).

The spelling of 28112135538 in words is "twenty-eight billion, one hundred twelve million, one hundred thirty-five thousand, five hundred thirty-eight".