28981435 has 16 divisors (see below), whose sum is σ = 41029632. Its totient is φ = 19231200.

The previous prime is 28981427. The next prime is 28981439. The reversal of 28981435 is 53418982.

28981435 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 28981435 - 2³ = 28981427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28981439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12271 + ... + 14440.

It is an arithmetic number, because the mean of its divisors is an integer number (2564352).

Almost surely, 2^28981435 is an apocalyptic number.

28981435 is a deficient number, since it is larger than the sum of its proper divisors (12048197).

28981435 is a wasteful number, since it uses less digits than its factorization.

28981435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26754.

The product of its digits is 69120, while the sum is 40.

The square root of 28981435 is about 5383.4408142005. The cubic root of 28981435 is about 307.1661081577.

The spelling of 28981435 in words is "twenty-eight million, nine hundred eighty-one thousand, four hundred thirty-five".