28717190 has 8 divisors (see below), whose sum is σ = 51690960. Its totient is φ = 11486872.

The previous prime is 28717187. The next prime is 28717193. The reversal of 28717190 is 9171782.

It is an interprime number because it is at equal distance from previous prime (28717187) and next prime (28717193).

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

It is a super-2 number, since 2×28717190² = 1649354002992200, 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 28717190.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28717193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1435850 + ... + 1435869.

It is an arithmetic number, because the mean of its divisors is an integer number (6461370).

Almost surely, 2^28717190 is an apocalyptic number.

28717190 is a deficient number, since it is larger than the sum of its proper divisors (22973770).

28717190 is a wasteful number, since it uses less digits than its factorization.

28717190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871726.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 28717190 is about 5358.8422257051. The cubic root of 28717190 is about 306.2297035001.

The spelling of 28717190 in words is "twenty-eight million, seven hundred seventeen thousand, one hundred ninety".