28741765 has 8 divisors (see below), whose sum is σ = 37143288. Its totient is φ = 21224640.

The previous prime is 28741733. The next prime is 28741771. The reversal of 28741765 is 56714782.

It can be written as a sum of positive squares in 4 ways, for example, as 1444 + 28740321 = 38^2 + 5361^2 .

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

It is not a de Polignac number, because 28741765 - 2⁵ = 28741733 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 221026 + ... + 221155.

It is an arithmetic number, because the mean of its divisors is an integer number (4642911).

Almost surely, 2^28741765 is an apocalyptic number.

It is an amenable number.

28741765 is a deficient number, since it is larger than the sum of its proper divisors (8401523).

28741765 is a wasteful number, since it uses less digits than its factorization.

28741765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442199.

The product of its digits is 94080, while the sum is 40.

The square root of 28741765 is about 5361.1346746748. The cubic root of 28741765 is about 306.3170315579.

The spelling of 28741765 in words is "twenty-eight million, seven hundred forty-one thousand, seven hundred sixty-five".