28715407 has 8 divisors (see below), whose sum is σ = 32903456. Its totient is φ = 24548832.

The previous prime is 28715389. The next prime is 28715413. The reversal of 28715407 is 70451782.

It is a happy number.

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

It is not a de Polignac number, because 28715407 - 2¹¹ = 28713359 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 (28715417) 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, 2388 + ... + 7945.

It is an arithmetic number, because the mean of its divisors is an integer number (4112932).

Almost surely, 2^28715407 is an apocalyptic number.

28715407 is a deficient number, since it is larger than the sum of its proper divisors (4188049).

28715407 is a wasteful number, since it uses less digits than its factorization.

28715407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10737.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 28715407 is about 5358.6758625616. The cubic root of 28715407 is about 306.2233656137.

The spelling of 28715407 in words is "twenty-eight million, seven hundred fifteen thousand, four hundred seven".