28194369 has 16 divisors (see below), whose sum is σ = 43963392. Its totient is φ = 15735888.

The previous prime is 28194367. The next prime is 28194371. The reversal of 28194369 is 96349182.

It is an interprime number because it is at equal distance from previous prime (28194367) and next prime (28194371).

It is not a de Polignac number, because 28194369 - 2¹ = 28194367 is a prime.

It is a super-2 number, since 2×28194369² = 1589844886616322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28194369.

It is not an unprimeable number, because it can be changed into a prime (28194367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14709 + ... + 16514.

It is an arithmetic number, because the mean of its divisors is an integer number (2747712).

Almost surely, 2^28194369 is an apocalyptic number.

It is an amenable number.

28194369 is a deficient number, since it is larger than the sum of its proper divisors (15769023).

28194369 is a wasteful number, since it uses less digits than its factorization.

28194369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31276.

The product of its digits is 93312, while the sum is 42.

The square root of 28194369 is about 5309.8370031480. The cubic root of 28194369 is about 304.3599189584.

The spelling of 28194369 in words is "twenty-eight million, one hundred ninety-four thousand, three hundred sixty-nine".