28148381899 has 8 divisors (see below), whose sum is σ = 30708643392. Its totient is φ = 25588340040.

The previous prime is 28148381897. The next prime is 28148381909. The reversal of 28148381899 is 99818384182.

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

It is a cyclic number.

It is not a de Polignac number, because 28148381899 - 2¹ = 28148381897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28148381897) 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, 331072 + ... + 407314.

It is an arithmetic number, because the mean of its divisors is an integer number (3838580424).

Almost surely, 2^28148381899 is an apocalyptic number.

28148381899 is a deficient number, since it is larger than the sum of its proper divisors (2560261493).

28148381899 is a wasteful number, since it uses less digits than its factorization.

28148381899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109817.

The product of its digits is 7962624, while the sum is 61.

The spelling of 28148381899 in words is "twenty-eight billion, one hundred forty-eight million, three hundred eighty-one thousand, eight hundred ninety-nine".