11028491 has 4 divisors (see below), whose sum is σ = 11058432. Its totient is φ = 10998552.

The previous prime is 11028487. The next prime is 11028509. The reversal of 11028491 is 19482011.

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 11028491 - 2² = 11028487 is a prime.

It is a super-2 number, since 2×11028491² = 243255227474162, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11028491.

It is not an unprimeable number, because it can be changed into a prime (11028421) 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, 14411 + ... + 15156.

It is an arithmetic number, because the mean of its divisors is an integer number (2764608).

Almost surely, 2^11028491 is an apocalyptic number.

11028491 is a deficient number, since it is larger than the sum of its proper divisors (29941).

11028491 is an equidigital number, since it uses as much as digits as its factorization.

11028491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29940.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 11028491 is about 3320.9171925840. The cubic root of 11028491 is about 222.5898538741.

The spelling of 11028491 in words is "eleven million, twenty-eight thousand, four hundred ninety-one".