28734749 has 4 divisors (see below), whose sum is σ = 29098560. Its totient is φ = 28370940.

The previous prime is 28734733. The next prime is 28734763. The reversal of 28734749 is 94743782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28734749 - 2⁴ = 28734733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28734049) 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, 181787 + ... + 181944.

It is an arithmetic number, because the mean of its divisors is an integer number (7274640).

Almost surely, 2^28734749 is an apocalyptic number.

It is an amenable number.

28734749 is a deficient number, since it is larger than the sum of its proper divisors (363811).

28734749 is an equidigital number, since it uses as much as digits as its factorization.

28734749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363810.

The product of its digits is 338688, while the sum is 44.

The square root of 28734749 is about 5360.4802956452. The cubic root of 28734749 is about 306.2921050536.

The spelling of 28734749 in words is "twenty-eight million, seven hundred thirty-four thousand, seven hundred forty-nine".