28812613 has 8 divisors (see below), whose sum is σ = 29403200. Its totient is φ = 28226880.

The previous prime is 28812611. The next prime is 28812647. The reversal of 28812613 is 31621882.

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 28812613 - 2¹ = 28812611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28812611) 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, 12253 + ... + 14413.

It is an arithmetic number, because the mean of its divisors is an integer number (3675400).

Almost surely, 2^28812613 is an apocalyptic number.

It is an amenable number.

28812613 is a deficient number, since it is larger than the sum of its proper divisors (590587).

28812613 is a wasteful number, since it uses less digits than its factorization.

28812613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2427.

The product of its digits is 4608, while the sum is 31.

The square root of 28812613 is about 5367.7381642550. The cubic root of 28812613 is about 306.5685139306.

The spelling of 28812613 in words is "twenty-eight million, eight hundred twelve thousand, six hundred thirteen".