28172413 has 4 divisors (see below), whose sum is σ = 28188000. Its totient is φ = 28156828.

The previous prime is 28172407. The next prime is 28172437. The reversal of 28172413 is 31427182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31427182 = 2 ⋅15713591.

It is a cyclic number.

It is not a de Polignac number, because 28172413 - 2¹³ = 28164221 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 (28172513) 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, 4663 + ... + 8836.

It is an arithmetic number, because the mean of its divisors is an integer number (7047000).

Almost surely, 2^28172413 is an apocalyptic number.

It is an amenable number.

28172413 is a deficient number, since it is larger than the sum of its proper divisors (15587).

28172413 is a wasteful number, since it uses less digits than its factorization.

28172413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15586.

The product of its digits is 2688, while the sum is 28.

The square root of 28172413 is about 5307.7691170585. The cubic root of 28172413 is about 304.2808929920.

Adding to 28172413 its reverse (31427182), we get a palindrome (59599595).

The spelling of 28172413 in words is "twenty-eight million, one hundred seventy-two thousand, four hundred thirteen".