28181195 has 8 divisors (see below), whose sum is σ = 38648544. Its totient is φ = 19324224.

The previous prime is 28181177. The next prime is 28181203. The reversal of 28181195 is 59118182.

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

It is a cyclic number.

It is not a de Polignac number, because 28181195 - 2¹² = 28177099 is a prime.

It is a super-3 number, since 3×28181195³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 805177 = 28181195 / (2 + 8 + 1 + 8 + 1 + 1 + 9 + 5).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402554 + ... + 402623.

It is an arithmetic number, because the mean of its divisors is an integer number (4831068).

Almost surely, 2^28181195 is an apocalyptic number.

28181195 is a deficient number, since it is larger than the sum of its proper divisors (10467349).

28181195 is an equidigital number, since it uses as much as digits as its factorization.

28181195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805189.

The product of its digits is 5760, while the sum is 35.

The square root of 28181195 is about 5308.5963304813. The cubic root of 28181195 is about 304.3125068641.

The spelling of 28181195 in words is "twenty-eight million, one hundred eighty-one thousand, one hundred ninety-five".