28119447 has 8 divisors (see below), whose sum is σ = 41658480. Its totient is φ = 18746280.

The previous prime is 28119439. The next prime is 28119517. The reversal of 28119447 is 74491182.

It is not a de Polignac number, because 28119447 - 2³ = 28119439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28119437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520704 + ... + 520757.

It is an arithmetic number, because the mean of its divisors is an integer number (5207310).

Almost surely, 2^28119447 is an apocalyptic number.

28119447 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28119447 is a deficient number, since it is larger than the sum of its proper divisors (13539033).

28119447 is a wasteful number, since it uses less digits than its factorization.

28119447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041470 (or 1041464 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 28119447 is about 5302.7772911937. Note that the first 3 decimals coincide. The cubic root of 28119447 is about 304.0900839619.

The spelling of 28119447 in words is "twenty-eight million, one hundred nineteen thousand, four hundred forty-seven".