28340188011 has 16 divisors (see below), whose sum is σ = 44455197600. Its totient is φ = 17782078464.

The previous prime is 28340188007. The next prime is 28340188013. The reversal of 28340188011 is 11088104382.

It is not a de Polignac number, because 28340188011 - 2² = 28340188007 is a prime.

It is a super-2 number, since 2×28340188011² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28340188013) 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, 30871206 + ... + 30872123.

It is an arithmetic number, because the mean of its divisors is an integer number (2778449850).

Almost surely, 2^28340188011 is an apocalyptic number.

28340188011 is a deficient number, since it is larger than the sum of its proper divisors (16115009589).

28340188011 is a wasteful number, since it uses less digits than its factorization.

28340188011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61743355 (or 61743349 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The spelling of 28340188011 in words is "twenty-eight billion, three hundred forty million, one hundred eighty-eight thousand, eleven".