28226613 has 8 divisors (see below), whose sum is σ = 39849408. Its totient is φ = 17710784.

The previous prime is 28226587. The next prime is 28226633. The reversal of 28226613 is 31662282.

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 28226613 - 2⁹ = 28226101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28226633) 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, 276681 + ... + 276782.

It is an arithmetic number, because the mean of its divisors is an integer number (4981176).

Almost surely, 2^28226613 is an apocalyptic number.

It is an amenable number.

28226613 is a deficient number, since it is larger than the sum of its proper divisors (11622795).

28226613 is a wasteful number, since it uses less digits than its factorization.

28226613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553483.

The product of its digits is 6912, while the sum is 30.

The square root of 28226613 is about 5312.8723869485. The cubic root of 28226613 is about 304.4759000666.

Adding to 28226613 its reverse (31662282), we get a palindrome (59888895).

The spelling of 28226613 in words is "twenty-eight million, two hundred twenty-six thousand, six hundred thirteen".