28744564911 has 8 divisors (see below), whose sum is σ = 38327188224. Its totient is φ = 19162492440.

The previous prime is 28744564883. The next prime is 28744564913. The reversal of 28744564911 is 11946544782.

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

It is not a de Polignac number, because 28744564911 - 2¹⁵ = 28744532143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28744564913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5256 + ... + 239826.

It is an arithmetic number, because the mean of its divisors is an integer number (4790898528).

Almost surely, 2^28744564911 is an apocalyptic number.

28744564911 is a deficient number, since it is larger than the sum of its proper divisors (9582623313).

28744564911 is a wasteful number, since it uses less digits than its factorization.

28744564911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275421.

The product of its digits is 1935360, while the sum is 51.

The spelling of 28744564911 in words is "twenty-eight billion, seven hundred forty-four million, five hundred sixty-four thousand, nine hundred eleven".