28194697 has 8 divisors (see below), whose sum is σ = 28476360. Its totient is φ = 27914880.

The previous prime is 28194671. The next prime is 28194701. The reversal of 28194697 is 79649182.

It can be written as a sum of positive squares in 4 ways, for example, as 1610361 + 26584336 = 1269^2 + 5156^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28194697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28194637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75403 + ... + 75775.

It is an arithmetic number, because the mean of its divisors is an integer number (3559545).

Almost surely, 2^28194697 is an apocalyptic number.

It is an amenable number.

28194697 is a deficient number, since it is larger than the sum of its proper divisors (281663).

28194697 is a wasteful number, since it uses less digits than its factorization.

28194697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923.

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

The square root of 28194697 is about 5309.8678891287. The cubic root of 28194697 is about 304.3610992138.

The spelling of 28194697 in words is "twenty-eight million, one hundred ninety-four thousand, six hundred ninety-seven".