28111066434 has 24 divisors (see below), whose sum is σ = 66444339312. Its totient is φ = 8518504920.

The previous prime is 28111066367. The next prime is 28111066481. The reversal of 28111066434 is 43466011182.

28111066434 is a `hidden beast` number, since 2 + 8 + 1 + 1 + 1 + 0 + 6 + 643 + 4 = 666.

It is a super-2 number, since 2×28111066434² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70987344 + ... + 70987739.

It is an arithmetic number, because the mean of its divisors is an integer number (2768514138).

Almost surely, 2^28111066434 is an apocalyptic number.

28111066434 is an abundant number, since it is smaller than the sum of its proper divisors (38333272878).

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

28111066434 is a wasteful number, since it uses less digits than its factorization.

28111066434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141975102 (or 141975099 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 28111066434 in words is "twenty-eight billion, one hundred eleven million, sixty-six thousand, four hundred thirty-four".