28172607 has 8 divisors (see below), whose sum is σ = 38016384. Its totient is φ = 18555288.

The previous prime is 28172593. The next prime is 28172609. The reversal of 28172607 is 70627182.

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

It is not a de Polignac number, because 28172607 - 2⁷ = 28172479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28172609) 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, 56323 + ... + 56820.

It is an arithmetic number, because the mean of its divisors is an integer number (4752048).

Almost surely, 2^28172607 is an apocalyptic number.

28172607 is a deficient number, since it is larger than the sum of its proper divisors (9843777).

28172607 is a wasteful number, since it uses less digits than its factorization.

28172607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113229.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 28172607 is about 5307.7873921249. The cubic root of 28172607 is about 304.2815914336.

Adding to 28172607 its reverse (70627182), we get a palindrome (98799789).

The spelling of 28172607 in words is "twenty-eight million, one hundred seventy-two thousand, six hundred seven".