28500045 has 16 divisors (see below), whose sum is σ = 52114560. Its totient is φ = 13028544.

The previous prime is 28500029. The next prime is 28500047. The reversal of 28500045 is 54000582.

It is not a de Polignac number, because 28500045 - 2⁴ = 28500029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28499988 and 28500024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28500047) 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, 135610 + ... + 135819.

It is an arithmetic number, because the mean of its divisors is an integer number (3257160).

Almost surely, 2^28500045 is an apocalyptic number.

It is an amenable number.

28500045 is a deficient number, since it is larger than the sum of its proper divisors (23614515).

28500045 is a wasteful number, since it uses less digits than its factorization.

28500045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271444.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 28500045 is about 5338.5433406501. The cubic root of 28500045 is about 305.4558979806.

The spelling of 28500045 in words is "twenty-eight million, five hundred thousand, forty-five".