28894661 has 2 divisors, whose sum is σ = 28894662. Its totient is φ = 28894660.

The previous prime is 28894639. The next prime is 28894673. The reversal of 28894661 is 16649882.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15249025 + 13645636 = 3905^2 + 3694^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28894661 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28894631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14447330 + 14447331.

It is an arithmetic number, because the mean of its divisors is an integer number (14447331).

Almost surely, 2^28894661 is an apocalyptic number.

It is an amenable number.

28894661 is a deficient number, since it is larger than the sum of its proper divisors (1).

28894661 is an equidigital number, since it uses as much as digits as its factorization.

28894661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 44.

The square root of 28894661 is about 5375.3754287491. The cubic root of 28894661 is about 306.8592372473.

It can be divided in two parts, 288 and 94661, that added together give a palindrome (94949).

The spelling of 28894661 in words is "twenty-eight million, eight hundred ninety-four thousand, six hundred sixty-one".