28194130 has 8 divisors (see below), whose sum is σ = 50749452. Its totient is φ = 11277648.

The previous prime is 28194079. The next prime is 28194137. The reversal of 28194130 is 3149182.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28185481 + 8649 = 5309^2 + 93^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28194137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1409697 + ... + 1409716.

Almost surely, 2^28194130 is an apocalyptic number.

28194130 is a deficient number, since it is larger than the sum of its proper divisors (22555322).

28194130 is a wasteful number, since it uses less digits than its factorization.

28194130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2819420.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 28194130 is about 5309.8144977014. The cubic root of 28194130 is about 304.3590589495.

The spelling of 28194130 in words is "twenty-eight million, one hundred ninety-four thousand, one hundred thirty".