28551513 has 8 divisors (see below), whose sum is σ = 38878848. Its totient is φ = 18629264.

The previous prime is 28551503. The next prime is 28551521. The reversal of 28551513 is 31515582.

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

It is a cyclic number.

It is not a de Polignac number, because 28551513 - 2⁹ = 28551001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28551503) 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, 101106 + ... + 101387.

It is an arithmetic number, because the mean of its divisors is an integer number (4859856).

Almost surely, 2^28551513 is an apocalyptic number.

It is an amenable number.

28551513 is a deficient number, since it is larger than the sum of its proper divisors (10327335).

28551513 is a wasteful number, since it uses less digits than its factorization.

28551513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202543.

The product of its digits is 6000, while the sum is 30.

The square root of 28551513 is about 5343.3615823749. The cubic root of 28551513 is about 305.6396608488.

The spelling of 28551513 in words is "twenty-eight million, five hundred fifty-one thousand, five hundred thirteen".