28981595 has 4 divisors (see below), whose sum is σ = 34777920. Its totient is φ = 23185272.

The previous prime is 28981591. The next prime is 28981597. The reversal of 28981595 is 59518982.

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 28981595 - 2² = 28981591 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28981591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2898155 + ... + 2898164.

It is an arithmetic number, because the mean of its divisors is an integer number (8694480).

Almost surely, 2^28981595 is an apocalyptic number.

28981595 is a deficient number, since it is larger than the sum of its proper divisors (5796325).

28981595 is an equidigital number, since it uses as much as digits as its factorization.

28981595 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5796324.

The product of its digits is 259200, while the sum is 47.

The square root of 28981595 is about 5383.4556745644. The cubic root of 28981595 is about 307.1666734217.

The spelling of 28981595 in words is "twenty-eight million, nine hundred eighty-one thousand, five hundred ninety-five".