28361801 has 8 divisors (see below), whose sum is σ = 30630600. Its totient is φ = 26105472.

The previous prime is 28361717. The next prime is 28361819. The reversal of 28361801 is 10816382.

It can be written as a sum of positive squares in 4 ways, for example, as 525625 + 27836176 = 725^2 + 5276^2 .

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 28361801 - 2¹⁴ = 28345417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28361881) 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, 1925 + ... + 7773.

It is an arithmetic number, because the mean of its divisors is an integer number (3828825).

Almost surely, 2^28361801 is an apocalyptic number.

It is an amenable number.

28361801 is a deficient number, since it is larger than the sum of its proper divisors (2268799).

28361801 is a wasteful number, since it uses less digits than its factorization.

28361801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6235.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 28361801 is about 5325.5798745301. The cubic root of 28361801 is about 304.9612097941.

The spelling of 28361801 in words is "twenty-eight million, three hundred sixty-one thousand, eight hundred one".