28167801 has 8 divisors (see below), whose sum is σ = 39190080. Its totient is φ = 17962032.

The previous prime is 28167791. The next prime is 28167803. The reversal of 28167801 is 10876182.

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 28167801 - 2⁷ = 28167673 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (28167803) 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, 204046 + ... + 204183.

It is an arithmetic number, because the mean of its divisors is an integer number (4898760).

Almost surely, 2^28167801 is an apocalyptic number.

It is an amenable number.

28167801 is a deficient number, since it is larger than the sum of its proper divisors (11022279).

28167801 is a wasteful number, since it uses less digits than its factorization.

28167801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408255.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 28167801 is about 5307.3346417953. The cubic root of 28167801 is about 304.2642878582.

The spelling of 28167801 in words is "twenty-eight million, one hundred sixty-seven thousand, eight hundred one".