28343761 has 4 divisors (see below), whose sum is σ = 28391524. Its totient is φ = 28296000.

The previous prime is 28343729. The next prime is 28343767. The reversal of 28343761 is 16734382.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14017536 + 14326225 = 3744^2 + 3785^2 .

It is a cyclic number.

It is not a de Polignac number, because 28343761 - 2⁵ = 28343729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28343767) 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, 22980 + ... + 24181.

It is an arithmetic number, because the mean of its divisors is an integer number (7097881).

Almost surely, 2^28343761 is an apocalyptic number.

It is an amenable number.

28343761 is a deficient number, since it is larger than the sum of its proper divisors (47763).

28343761 is an equidigital number, since it uses as much as digits as its factorization.

28343761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47762.

The product of its digits is 24192, while the sum is 34.

The square root of 28343761 is about 5323.8858928418. The cubic root of 28343761 is about 304.8965375132.

It can be divided in two parts, 283 and 43761, that added together give a palindrome (44044).

The spelling of 28343761 in words is "twenty-eight million, three hundred forty-three thousand, seven hundred sixty-one".