28111215234 has 16 divisors (see below), whose sum is σ = 57144110400. Its totient is φ = 9216791760.

The previous prime is 28111215229. The next prime is 28111215257. The reversal of 28111215234 is 43251211182.

It is a happy 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, 38402934 + ... + 38403665.

It is an arithmetic number, because the mean of its divisors is an integer number (3571506900).

Almost surely, 2^28111215234 is an apocalyptic number.

28111215234 is an abundant number, since it is smaller than the sum of its proper divisors (29032895166).

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

28111215234 is a wasteful number, since it uses less digits than its factorization.

28111215234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76806665.

The product of its digits is 3840, while the sum is 30.

The spelling of 28111215234 in words is "twenty-eight billion, one hundred eleven million, two hundred fifteen thousand, two hundred thirty-four".