28874201 has 4 divisors (see below), whose sum is σ = 29269812. Its totient is φ = 28478592.

The previous prime is 28874189. The next prime is 28874213. The reversal of 28874201 is 10247882.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (28874189) and next prime (28874213).

It can be written as a sum of positive squares in 2 ways, for example, as 10896601 + 17977600 = 3301^2 + 4240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28874201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28874231) 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, 197696 + ... + 197841.

It is an arithmetic number, because the mean of its divisors is an integer number (7317453).

Almost surely, 2^28874201 is an apocalyptic number.

It is an amenable number.

28874201 is a deficient number, since it is larger than the sum of its proper divisors (395611).

28874201 is an equidigital number, since it uses as much as digits as its factorization.

28874201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395610.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 28874201 is about 5373.4719688484. The cubic root of 28874201 is about 306.7867922322.

The spelling of 28874201 in words is "twenty-eight million, eight hundred seventy-four thousand, two hundred one".