28660413 has 8 divisors (see below), whose sum is σ = 38267776. Its totient is φ = 19080000.

The previous prime is 28660409. The next prime is 28660421. The reversal of 28660413 is 31406682.

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

It is not a de Polignac number, because 28660413 - 2² = 28660409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28660433) 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, 4108 + ... + 8613.

It is an arithmetic number, because the mean of its divisors is an integer number (4783472).

Almost surely, 2^28660413 is an apocalyptic number.

It is an amenable number.

28660413 is a deficient number, since it is larger than the sum of its proper divisors (9607363).

28660413 is a wasteful number, since it uses less digits than its factorization.

28660413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13475.

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

The square root of 28660413 is about 5353.5420984615. The cubic root of 28660413 is about 306.0277539011.

The spelling of 28660413 in words is "twenty-eight million, six hundred sixty thousand, four hundred thirteen".