28980491 has 8 divisors (see below), whose sum is σ = 30637200. Its totient is φ = 27336960.

The previous prime is 28980463. The next prime is 28980517. The reversal of 28980491 is 19408982.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28980491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28980431) 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 7 ways as a sum of consecutive naturals, for example, 1415 + ... + 7743.

It is an arithmetic number, because the mean of its divisors is an integer number (3829650).

Almost surely, 2^28980491 is an apocalyptic number.

28980491 is a deficient number, since it is larger than the sum of its proper divisors (1656709).

28980491 is a wasteful number, since it uses less digits than its factorization.

28980491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6589.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 28980491 is about 5383.3531372185. The cubic root of 28980491 is about 307.1627730576.

The spelling of 28980491 in words is "twenty-eight million, nine hundred eighty thousand, four hundred ninety-one".