28386497 has 4 divisors (see below), whose sum is σ = 28459860. Its totient is φ = 28313136.

The previous prime is 28386487. The next prime is 28386503. The reversal of 28386497 is 79468382.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8708401 + 19678096 = 2951^2 + 4436^2 .

It is a cyclic number.

It is not a de Polignac number, because 28386497 - 2¹⁴ = 28370113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28386427) 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, 36098 + ... + 36875.

It is an arithmetic number, because the mean of its divisors is an integer number (7114965).

Almost surely, 2^28386497 is an apocalyptic number.

It is an amenable number.

28386497 is a deficient number, since it is larger than the sum of its proper divisors (73363).

28386497 is an equidigital number, since it uses as much as digits as its factorization.

28386497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73362.

The product of its digits is 580608, while the sum is 47.

The square root of 28386497 is about 5327.8979907652. The cubic root of 28386497 is about 305.0496989692.

The spelling of 28386497 in words is "twenty-eight million, three hundred eighty-six thousand, four hundred ninety-seven".