28060491 has 4 divisors (see below), whose sum is σ = 37413992. Its totient is φ = 18706992.

The previous prime is 28060447. The next prime is 28060531. The reversal of 28060491 is 19406082.

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

It is not a de Polignac number, because 28060491 - 2¹⁰ = 28059467 is a prime.

It is a super-2 number, since 2×28060491² = 1574782310322162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28060411) 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, 4676746 + ... + 4676751.

It is an arithmetic number, because the mean of its divisors is an integer number (9353498).

Almost surely, 2^28060491 is an apocalyptic number.

28060491 is a deficient number, since it is larger than the sum of its proper divisors (9353501).

28060491 is an equidigital number, since it uses as much as digits as its factorization.

28060491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9353500.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 28060491 is about 5297.2154005666. The cubic root of 28060491 is about 303.8774140731.

The spelling of 28060491 in words is "twenty-eight million, sixty thousand, four hundred ninety-one".