28408149 has 24 divisors (see below), whose sum is σ = 51160512. Its totient is φ = 14757120.

The previous prime is 28408141. The next prime is 28408181. The reversal of 28408149 is 94180482.

It is not a de Polignac number, because 28408149 - 2³ = 28408141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28408141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19804 + ... + 21189.

It is an arithmetic number, because the mean of its divisors is an integer number (2131688).

Almost surely, 2^28408149 is an apocalyptic number.

It is an amenable number.

28408149 is a deficient number, since it is larger than the sum of its proper divisors (22752363).

28408149 is a wasteful number, since it uses less digits than its factorization.

28408149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41017 (or 41014 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 28408149 is about 5329.9295492530. The cubic root of 28408149 is about 305.1272388582.

The spelling of 28408149 in words is "twenty-eight million, four hundred eight thousand, one hundred forty-nine".