28194912 has 48 divisors (see below), whose sum is σ = 82237680. Its totient is φ = 9398016.

The previous prime is 28194869. The next prime is 28194919. The reversal of 28194912 is 21949182.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28194919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15453 + ... + 17180.

It is an arithmetic number, because the mean of its divisors is an integer number (1713285).

Almost surely, 2^28194912 is an apocalyptic number.

It is an amenable number.

28194912 is an abundant number, since it is smaller than the sum of its proper divisors (54042768).

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

28194912 is a wasteful number, since it uses less digits than its factorization.

28194912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32652 (or 32638 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 28194912 is about 5309.8881344149. Note that the first 3 decimals coincide. The cubic root of 28194912 is about 304.3618728518.

It can be divided in two parts, 281949 and 12, that added together give a square (281961 = 531²).

The spelling of 28194912 in words is "twenty-eight million, one hundred ninety-four thousand, nine hundred twelve".