28511841 has 4 divisors (see below), whose sum is σ = 38015792. Its totient is φ = 19007892.

The previous prime is 28511831. The next prime is 28511849. The reversal of 28511841 is 14811582.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28511841 - 2⁷ = 28511713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28511799 and 28511808.

It is not an unprimeable number, because it can be changed into a prime (28511849) 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, 4751971 + ... + 4751976.

It is an arithmetic number, because the mean of its divisors is an integer number (9503948).

Almost surely, 2^28511841 is an apocalyptic number.

It is an amenable number.

28511841 is a deficient number, since it is larger than the sum of its proper divisors (9503951).

28511841 is an equidigital number, since it uses as much as digits as its factorization.

28511841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9503950.

The product of its digits is 2560, while the sum is 30.

The square root of 28511841 is about 5339.6480221078. The cubic root of 28511841 is about 305.4980342974.

The spelling of 28511841 in words is "twenty-eight million, five hundred eleven thousand, eight hundred forty-one".