28113518 has 4 divisors (see below), whose sum is σ = 42170280. Its totient is φ = 14056758.

The previous prime is 28113457. The next prime is 28113523. The reversal of 28113518 is 81531182.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7028378 + ... + 7028381.

It is an arithmetic number, because the mean of its divisors is an integer number (10542570).

Almost surely, 2^28113518 is an apocalyptic number.

28113518 is a deficient number, since it is larger than the sum of its proper divisors (14056762).

28113518 is a wasteful number, since it uses less digits than its factorization.

28113518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14056761.

The product of its digits is 1920, while the sum is 29.

The square root of 28113518 is about 5302.2182150492. The cubic root of 28113518 is about 304.0687099423.

The spelling of 28113518 in words is "twenty-eight million, one hundred thirteen thousand, five hundred eighteen".