28503713 has 8 divisors (see below), whose sum is σ = 34492032. Its totient is φ = 22994496.

The previous prime is 28503703. The next prime is 28503721. The reversal of 28503713 is 31730582.

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

It is not a de Polignac number, because 28503713 - 2⁴ = 28503697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28503703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119645 + ... + 119882.

It is an arithmetic number, because the mean of its divisors is an integer number (4311504).

Almost surely, 2^28503713 is an apocalyptic number.

It is an amenable number.

28503713 is a deficient number, since it is larger than the sum of its proper divisors (5988319).

28503713 is a wasteful number, since it uses less digits than its factorization.

28503713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239551.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 28503713 is about 5338.8868690018. The cubic root of 28503713 is about 305.4690016344.

The spelling of 28503713 in words is "twenty-eight million, five hundred three thousand, seven hundred thirteen".