28241965 has 4 divisors (see below), whose sum is σ = 33890364. Its totient is φ = 22593568.

The previous prime is 28241959. The next prime is 28242001. The reversal of 28241965 is 56914282.

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 15468489 + 12773476 = 3933^2 + 3574^2 .

It is a cyclic number.

It is not a de Polignac number, because 28241965 - 2³ = 28241957 is a prime.

It is a super-2 number, since 2×28241965² = 1595217174122450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2824192 + ... + 2824201.

It is an arithmetic number, because the mean of its divisors is an integer number (8472591).

Almost surely, 2^28241965 is an apocalyptic number.

It is an amenable number.

28241965 is a deficient number, since it is larger than the sum of its proper divisors (5648399).

28241965 is an equidigital number, since it uses as much as digits as its factorization.

28241965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5648398.

The product of its digits is 34560, while the sum is 37.

The square root of 28241965 is about 5314.3169833949. The cubic root of 28241965 is about 304.5310899075.

The spelling of 28241965 in words is "twenty-eight million, two hundred forty-one thousand, nine hundred sixty-five".