28140045 has 16 divisors (see below), whose sum is σ = 47394240. Its totient is φ = 14217984.

The previous prime is 28140043. The next prime is 28140059. The reversal of 28140045 is 54004182.

It is not a de Polignac number, because 28140045 - 2¹ = 28140043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28139997 and 28140024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28140043) 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, 49084 + ... + 49653.

It is an arithmetic number, because the mean of its divisors is an integer number (2962140).

Almost surely, 2^28140045 is an apocalyptic number.

It is an amenable number.

28140045 is a deficient number, since it is larger than the sum of its proper divisors (19254195).

28140045 is a wasteful number, since it uses less digits than its factorization.

28140045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98764.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 28140045 is about 5304.7191254580. The cubic root of 28140045 is about 304.1643163222.

The spelling of 28140045 in words is "twenty-eight million, one hundred forty thousand, forty-five".