28934193 has 4 divisors (see below), whose sum is σ = 38578928. Its totient is φ = 19289460.

The previous prime is 28934189. The next prime is 28934197. The reversal of 28934193 is 39143982.

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 an interprime number because it is at equal distance from previous prime (28934189) and next prime (28934197).

It is not a de Polignac number, because 28934193 - 2² = 28934189 is a prime.

It is a super-2 number, since 2×28934193² = 1674375049122498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28934197) 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, 4822363 + ... + 4822368.

It is an arithmetic number, because the mean of its divisors is an integer number (9644732).

Almost surely, 2^28934193 is an apocalyptic number.

It is an amenable number.

28934193 is a deficient number, since it is larger than the sum of its proper divisors (9644735).

28934193 is an equidigital number, since it uses as much as digits as its factorization.

28934193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9644734.

The product of its digits is 46656, while the sum is 39.

The square root of 28934193 is about 5379.0513104078. The cubic root of 28934193 is about 306.9991158148. Note that the first 3 decimals are identical.

The spelling of 28934193 in words is "twenty-eight million, nine hundred thirty-four thousand, one hundred ninety-three".