28194370 has 32 divisors (see below), whose sum is σ = 52533936. Its totient is φ = 10886400.

The previous prime is 28194367. The next prime is 28194371. The reversal of 28194370 is 7349182.

It can be written as a sum of positive squares in 8 ways, for example, as 1640961 + 26553409 = 1281^2 + 5153^2 .

It is a super-3 number, since 3×28194370³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (28194371) 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, 66760 + ... + 67180.

Almost surely, 2^28194370 is an apocalyptic number.

28194370 is a deficient number, since it is larger than the sum of its proper divisors (24339566).

28194370 is a wasteful number, since it uses less digits than its factorization.

28194370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646.

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

The square root of 28194370 is about 5309.8370973129. The cubic root of 28194370 is about 304.3599225568.

The spelling of 28194370 in words is "twenty-eight million, one hundred ninety-four thousand, three hundred seventy".