28657411 has 4 divisors (see below), whose sum is σ = 28676032. Its totient is φ = 28638792.

The previous prime is 28657331. The next prime is 28657439. The reversal of 28657411 is 11475682.

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

It is a cyclic number.

It is not a de Polignac number, because 28657411 - 2⁷ = 28657283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28657511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6771 + ... + 10156.

It is an arithmetic number, because the mean of its divisors is an integer number (7169008).

Almost surely, 2^28657411 is an apocalyptic number.

28657411 is the 3386-th heptagonal number.

28657411 is a deficient number, since it is larger than the sum of its proper divisors (18621).

28657411 is a wasteful number, since it uses less digits than its factorization.

28657411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18620.

The product of its digits is 13440, while the sum is 34.

The square root of 28657411 is about 5353.2617160008. The cubic root of 28657411 is about 306.0170686935.

The spelling of 28657411 in words is "twenty-eight million, six hundred fifty-seven thousand, four hundred eleven".