28164941 has 4 divisors (see below), whose sum is σ = 32188512. Its totient is φ = 24141372.

The previous prime is 28164883. The next prime is 28164953. The reversal of 28164941 is 14946182.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28164941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28164841) 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, 2011775 + ... + 2011788.

It is an arithmetic number, because the mean of its divisors is an integer number (8047128).

Almost surely, 2^28164941 is an apocalyptic number.

It is an amenable number.

28164941 is a deficient number, since it is larger than the sum of its proper divisors (4023571).

28164941 is an equidigital number, since it uses as much as digits as its factorization.

28164941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4023570.

The product of its digits is 13824, while the sum is 35.

The square root of 28164941 is about 5307.0651965093. The cubic root of 28164941 is about 304.2539897484.

The spelling of 28164941 in words is "twenty-eight million, one hundred sixty-four thousand, nine hundred forty-one".