28644701 has 2 divisors, whose sum is σ = 28644702. Its totient is φ = 28644700.

The previous prime is 28644659. The next prime is 28644719. The reversal of 28644701 is 10744682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28622500 + 22201 = 5350^2 + 149^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28644701 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28644731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14322350 + 14322351.

It is an arithmetic number, because the mean of its divisors is an integer number (14322351).

Almost surely, 2^28644701 is an apocalyptic number.

It is an amenable number.

28644701 is a deficient number, since it is larger than the sum of its proper divisors (1).

28644701 is an equidigital number, since it uses as much as digits as its factorization.

28644701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 28644701 is about 5352.0744576286. The cubic root of 28644701 is about 305.9718209203.

The spelling of 28644701 in words is "twenty-eight million, six hundred forty-four thousand, seven hundred one".