28741539 has 4 divisors (see below), whose sum is σ = 38322056. Its totient is φ = 19161024.

The previous prime is 28741511. The next prime is 28741541. The reversal of 28741539 is 93514782.

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

It is not a de Polignac number, because 28741539 - 2⁵ = 28741507 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28741497 and 28741506.

It is not an unprimeable number, because it can be changed into a prime (28741579) 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, 4790254 + ... + 4790259.

It is an arithmetic number, because the mean of its divisors is an integer number (9580514).

Almost surely, 2^28741539 is an apocalyptic number.

28741539 is a deficient number, since it is larger than the sum of its proper divisors (9580517).

28741539 is an equidigital number, since it uses as much as digits as its factorization.

28741539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9580516.

The product of its digits is 60480, while the sum is 39.

The square root of 28741539 is about 5361.1135970058. The cubic root of 28741539 is about 306.3162286864.

The spelling of 28741539 in words is "twenty-eight million, seven hundred forty-one thousand, five hundred thirty-nine".