28361481 has 8 divisors (see below), whose sum is σ = 37865184. Its totient is φ = 18882720.

The previous prime is 28361453. The next prime is 28361483. The reversal of 28361481 is 18416382.

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

It is not a de Polignac number, because 28361481 - 2⁷ = 28361353 is a prime.

It is a super-2 number, since 2×28361481² = 1608747209026722, which contains 22 as substring.

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 (28361483) 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, 3396 + ... + 8261.

It is an arithmetic number, because the mean of its divisors is an integer number (4733148).

Almost surely, 2^28361481 is an apocalyptic number.

It is an amenable number.

28361481 is a deficient number, since it is larger than the sum of its proper divisors (9503703).

28361481 is a wasteful number, since it uses less digits than its factorization.

28361481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12471.

The product of its digits is 9216, while the sum is 33.

The square root of 28361481 is about 5325.5498307687. The cubic root of 28361481 is about 304.9600628529.

The spelling of 28361481 in words is "twenty-eight million, three hundred sixty-one thousand, four hundred eighty-one".