28393707 has 8 divisors (see below), whose sum is σ = 39504384. Its totient is φ = 18106088.

The previous prime is 28393699. The next prime is 28393711. The reversal of 28393707 is 70739382.

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 28393707 - 2³ = 28393699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28393207) 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, 205683 + ... + 205820.

It is an arithmetic number, because the mean of its divisors is an integer number (4938048).

Almost surely, 2^28393707 is an apocalyptic number.

28393707 is a deficient number, since it is larger than the sum of its proper divisors (11110677).

28393707 is a wasteful number, since it uses less digits than its factorization.

28393707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411529.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 28393707 is about 5328.5745748746. The cubic root of 28393707 is about 305.0755237143.

The spelling of 28393707 in words is "twenty-eight million, three hundred ninety-three thousand, seven hundred seven".