28045149 has 32 divisors (see below), whose sum is σ = 42491904. Its totient is φ = 16303680.

The previous prime is 28045141. The next prime is 28045151. The reversal of 28045149 is 94154082.

It is not a de Polignac number, because 28045149 - 2³ = 28045141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28045141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125652 + ... + 125874.

It is an arithmetic number, because the mean of its divisors is an integer number (1327872).

Almost surely, 2^28045149 is an apocalyptic number.

It is an amenable number.

28045149 is a deficient number, since it is larger than the sum of its proper divisors (14446755).

28045149 is a wasteful number, since it uses less digits than its factorization.

28045149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 28045149 is about 5295.7670832468. The cubic root of 28045149 is about 303.8220225833.

The spelling of 28045149 in words is "twenty-eight million, forty-five thousand, one hundred forty-nine".