28194769 has 4 divisors (see below), whose sum is σ = 28217344. Its totient is φ = 28172196.

The previous prime is 28194767. The next prime is 28194773. The reversal of 28194769 is 96749182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28194769 - 2¹ = 28194767 is a prime.

It is a super-2 number, since 2×28194769² = 1589889997926722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28194763) 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, 9297 + ... + 11950.

It is an arithmetic number, because the mean of its divisors is an integer number (7054336).

Almost surely, 2^28194769 is an apocalyptic number.

It is an amenable number.

28194769 is a deficient number, since it is larger than the sum of its proper divisors (22575).

28194769 is a wasteful number, since it uses less digits than its factorization.

28194769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22574.

The product of its digits is 217728, while the sum is 46.

The square root of 28194769 is about 5309.8746689541. The cubic root of 28194769 is about 304.3613582930.

The spelling of 28194769 in words is "twenty-eight million, one hundred ninety-four thousand, seven hundred sixty-nine".