28194037 has 4 divisors (see below), whose sum is σ = 28956076. Its totient is φ = 27432000.

The previous prime is 28194011. The next prime is 28194059. The reversal of 28194037 is 73049182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73049182 = 2 ⋅36524591.

It can be written as a sum of positive squares in 2 ways, for example, as 24542116 + 3651921 = 4954^2 + 1911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28194037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28193993 and 28194011.

It is a congruent number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380964 + ... + 381037.

It is an arithmetic number, because the mean of its divisors is an integer number (7239019).

Almost surely, 2^28194037 is an apocalyptic number.

It is an amenable number.

28194037 is a deficient number, since it is larger than the sum of its proper divisors (762039).

28194037 is an equidigital number, since it uses as much as digits as its factorization.

28194037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762038.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 28194037 is about 5309.8057403261. The cubic root of 28194037 is about 304.3587243004.

The spelling of 28194037 in words is "twenty-eight million, one hundred ninety-four thousand, thirty-seven".