27998701 has 4 divisors (see below), whose sum is σ = 28009692. Its totient is φ = 27987712.

The previous prime is 27998671. The next prime is 27998713. The reversal of 27998701 is 10789972.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 14668900 + 13329801 = 3830^2 + 3651^2 .

It is a cyclic number.

It is not a de Polignac number, because 27998701 - 2⁵ = 27998669 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 (27993701) 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, 525 + ... + 7501.

It is an arithmetic number, because the mean of its divisors is an integer number (7002423).

Almost surely, 2^27998701 is an apocalyptic number.

It is an amenable number.

27998701 is a deficient number, since it is larger than the sum of its proper divisors (10991).

27998701 is an equidigital number, since it uses as much as digits as its factorization.

27998701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10990.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 27998701 is about 5291.3798767429. The cubic root of 27998701 is about 303.6542012470.

The spelling of 27998701 in words is "twenty-seven million, nine hundred ninety-eight thousand, seven hundred one".