28173801 has 8 divisors (see below), whose sum is σ = 37687104. Its totient is φ = 18721520.

The previous prime is 28173797. The next prime is 28173829. The reversal of 28173801 is 10837182.

It is a happy number.

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 28173801 - 2² = 28173797 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28173841) 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, 14166 + ... + 16031.

It is an arithmetic number, because the mean of its divisors is an integer number (4710888).

Almost surely, 2^28173801 is an apocalyptic number.

It is an amenable number.

28173801 is a deficient number, since it is larger than the sum of its proper divisors (9513303).

28173801 is a wasteful number, since it uses less digits than its factorization.

28173801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30511.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 28173801 is about 5307.8998671791. The cubic root of 28173801 is about 304.2858900192.

Subtracting from 28173801 its sum of digits (30), we obtain a triangular number (28173771 = T₇₅₀₆).

The spelling of 28173801 in words is "twenty-eight million, one hundred seventy-three thousand, eight hundred one".