28747713 has 4 divisors (see below), whose sum is σ = 38330288. Its totient is φ = 19165140.

The previous prime is 28747711. The next prime is 28747717. The reversal of 28747713 is 31774782.

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 not a de Polignac number, because 28747713 - 2¹ = 28747711 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28747711) 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, 4791283 + ... + 4791288.

It is an arithmetic number, because the mean of its divisors is an integer number (9582572).

Almost surely, 2^28747713 is an apocalyptic number.

It is an amenable number.

28747713 is a deficient number, since it is larger than the sum of its proper divisors (9582575).

28747713 is an equidigital number, since it uses as much as digits as its factorization.

28747713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9582574.

The product of its digits is 65856, while the sum is 39.

The square root of 28747713 is about 5361.6893792908. The cubic root of 28747713 is about 306.3381604857.

The spelling of 28747713 in words is "twenty-eight million, seven hundred forty-seven thousand, seven hundred thirteen".