28194156 has 60 divisors (see below), whose sum is σ = 74278512. Its totient is φ = 9325152.

The previous prime is 28194151. The next prime is 28194161. The reversal of 28194156 is 65149182.

It is an interprime number because it is at equal distance from previous prime (28194151) and next prime (28194161).

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 28194156.

It is not an unprimeable number, because it can be changed into a prime (28194151) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 55801 + ... + 56303.

Almost surely, 2^28194156 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 28194156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37139256).

28194156 is an abundant number, since it is smaller than the sum of its proper divisors (46084356).

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

28194156 is a wasteful number, since it uses less digits than its factorization.

28194156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692 (or 681 counting only the distinct ones).

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

The square root of 28194156 is about 5309.8169459973. The cubic root of 28194156 is about 304.3591525072.

The spelling of 28194156 in words is "twenty-eight million, one hundred ninety-four thousand, one hundred fifty-six".