28181741 has 8 divisors (see below), whose sum is σ = 32688960. Its totient is φ = 23794848.

The previous prime is 28181729. The next prime is 28181789. The reversal of 28181741 is 14718182.

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

It is not a de Polignac number, because 28181741 - 2⁶ = 28181677 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28181698 and 28181707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28181941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29576 + ... + 30513.

It is an arithmetic number, because the mean of its divisors is an integer number (4086120).

Almost surely, 2^28181741 is an apocalyptic number.

It is an amenable number.

28181741 is a deficient number, since it is larger than the sum of its proper divisors (4507219).

28181741 is an equidigital number, since it uses as much as digits as its factorization.

28181741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60163.

The product of its digits is 3584, while the sum is 32.

The square root of 28181741 is about 5308.6477562558. The cubic root of 28181741 is about 304.3144721647.

The spelling of 28181741 in words is "twenty-eight million, one hundred eighty-one thousand, seven hundred forty-one".