28461599 has 4 divisors (see below), whose sum is σ = 28503480. Its totient is φ = 28419720.

The previous prime is 28461569. The next prime is 28461611. The reversal of 28461599 is 99516482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28461599 - 2⁸ = 28461343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28461509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19904 + ... + 21285.

It is an arithmetic number, because the mean of its divisors is an integer number (7125870).

Almost surely, 2^28461599 is an apocalyptic number.

28461599 is a deficient number, since it is larger than the sum of its proper divisors (41881).

28461599 is an equidigital number, since it uses as much as digits as its factorization.

28461599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41880.

The product of its digits is 155520, while the sum is 44.

The square root of 28461599 is about 5334.9413305115. The cubic root of 28461599 is about 305.3184848405.

The spelling of 28461599 in words is "twenty-eight million, four hundred sixty-one thousand, five hundred ninety-nine".