28102513 has 8 divisors (see below), whose sum is σ = 29985120. Its totient is φ = 26245440.

The previous prime is 28102469. The next prime is 28102519. The reversal of 28102513 is 31520182.

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 28102513 - 2⁹ = 28102001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28102519) 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, 4083 + ... + 8536.

It is an arithmetic number, because the mean of its divisors is an integer number (3748140).

Almost surely, 2^28102513 is an apocalyptic number.

It is an amenable number.

28102513 is a deficient number, since it is larger than the sum of its proper divisors (1882607).

28102513 is a wasteful number, since it uses less digits than its factorization.

28102513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12767.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 28102513 is about 5301.1803402639. The cubic root of 28102513 is about 304.0290289973.

Adding to 28102513 its reverse (31520182), we get a palindrome (59622695).

The spelling of 28102513 in words is "twenty-eight million, one hundred two thousand, five hundred thirteen".