28744418091 has 16 divisors (see below), whose sum is σ = 40592886048. Its totient is φ = 18030144000.

The previous prime is 28744418081. The next prime is 28744418111. The reversal of 28744418091 is 19081444782.

It is not a de Polignac number, because 28744418091 - 2⁷ = 28744417963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28744418091.

It is not an unprimeable number, because it can be changed into a prime (28744418051) 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, 82981 + ... + 253721.

It is an arithmetic number, because the mean of its divisors is an integer number (2537055378).

Almost surely, 2^28744418091 is an apocalyptic number.

28744418091 is a deficient number, since it is larger than the sum of its proper divisors (11848467957).

28744418091 is a wasteful number, since it uses less digits than its factorization.

28744418091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174062.

The product of its (nonzero) digits is 516096, while the sum is 48.

The spelling of 28744418091 in words is "twenty-eight billion, seven hundred forty-four million, four hundred eighteen thousand, ninety-one".