28182461 has 8 divisors (see below), whose sum is σ = 29247480. Its totient is φ = 27123712.

The previous prime is 28182449. The next prime is 28182463. The reversal of 28182461 is 16428182.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9424900 + 18757561 = 3070^2 + 4331^2 .

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 28182461 - 2⁶ = 28182397 is a prime.

It is a super-2 number, since 2×28182461² = 1588502216033042, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28182463) 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, 8861 + ... + 11613.

It is an arithmetic number, because the mean of its divisors is an integer number (3655935).

Almost surely, 2^28182461 is an apocalyptic number.

It is an amenable number.

28182461 is a deficient number, since it is larger than the sum of its proper divisors (1065019).

28182461 is a wasteful number, since it uses less digits than its factorization.

28182461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3135.

The product of its digits is 6144, while the sum is 32.

The square root of 28182461 is about 5308.7155697023. The cubic root of 28182461 is about 304.3170637310.

The spelling of 28182461 in words is "twenty-eight million, one hundred eighty-two thousand, four hundred sixty-one".