28741885 has 4 divisors (see below), whose sum is σ = 34490268. Its totient is φ = 22993504.

The previous prime is 28741879. The next prime is 28741891. The reversal of 28741885 is 58814782.

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

It is an interprime number because it is at equal distance from previous prime (28741879) and next prime (28741891).

It can be written as a sum of positive squares in 2 ways, for example, as 19236996 + 9504889 = 4386^2 + 3083^2 .

It is a cyclic number.

It is not a de Polignac number, because 28741885 - 2³ = 28741877 is a prime.

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, 2874184 + ... + 2874193.

It is an arithmetic number, because the mean of its divisors is an integer number (8622567).

Almost surely, 2^28741885 is an apocalyptic number.

It is an amenable number.

28741885 is a deficient number, since it is larger than the sum of its proper divisors (5748383).

28741885 is an equidigital number, since it uses as much as digits as its factorization.

28741885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5748382.

The product of its digits is 143360, while the sum is 43.

The square root of 28741885 is about 5361.1458663237. The cubic root of 28741885 is about 306.3174578596.

The spelling of 28741885 in words is "twenty-eight million, seven hundred forty-one thousand, eight hundred eighty-five".