28149156 has 72 divisors (see below), whose sum is σ = 83545280. Its totient is φ = 7822656.

The previous prime is 28149151. The next prime is 28149197. The reversal of 28149156 is 65194182.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28149156.

It is not an unprimeable number, because it can be changed into a prime (28149151) 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, 7815 + ... + 10833.

Almost surely, 2^28149156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28149156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41772640).

28149156 is an abundant number, since it is smaller than the sum of its proper divisors (55396124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28149156 is a wasteful number, since it uses less digits than its factorization.

28149156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3073 (or 3068 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 28149156 is about 5305.5778196159. The cubic root of 28149156 is about 304.1971395587.

The spelling of 28149156 in words is "twenty-eight million, one hundred forty-nine thousand, one hundred fifty-six".