28402717 has 8 divisors (see below), whose sum is σ = 33337856. Its totient is φ = 23686992.

The previous prime is 28402691. The next prime is 28402771. The reversal of 28402717 is 71720482.

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

It is not a de Polignac number, because 28402717 - 2⁷ = 28402589 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 (28400717) 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, 54573 + ... + 55090.

It is an arithmetic number, because the mean of its divisors is an integer number (4167232).

Almost surely, 2^28402717 is an apocalyptic number.

It is an amenable number.

28402717 is a deficient number, since it is larger than the sum of its proper divisors (4935139).

28402717 is a wasteful number, since it uses less digits than its factorization.

28402717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109707.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 28402717 is about 5329.4199496756. The cubic root of 28402717 is about 305.1077895467.

The spelling of 28402717 in words is "twenty-eight million, four hundred two thousand, seven hundred seventeen".