28894997 has 2 divisors, whose sum is σ = 28894998. Its totient is φ = 28894996.

The previous prime is 28894967. The next prime is 28895003. The reversal of 28894997 is 79949882.

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., 27730756 + 1164241 = 5266^2 + 1079^2 .

It is a cyclic number.

It is not a de Polignac number, because 28894997 - 2⁸ = 28894741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28894937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14447498 + 14447499.

It is an arithmetic number, because the mean of its divisors is an integer number (14447499).

Almost surely, 2^28894997 is an apocalyptic number.

It is an amenable number.

28894997 is a deficient number, since it is larger than the sum of its proper divisors (1).

28894997 is an equidigital number, since it uses as much as digits as its factorization.

28894997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 56.

The square root of 28894997 is about 5375.4066822893. The cubic root of 28894997 is about 306.8604266747.

The spelling of 28894997 in words is "twenty-eight million, eight hundred ninety-four thousand, nine hundred ninety-seven".