28361387 has 2 divisors, whose sum is σ = 28361388. Its totient is φ = 28361386.

The previous prime is 28361371. The next prime is 28361453. The reversal of 28361387 is 78316382.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28361387 - 2⁴ = 28361371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28361387.

It is not a weakly prime, because it can be changed into another prime (28361327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14180693 + 14180694.

It is an arithmetic number, because the mean of its divisors is an integer number (14180694).

Almost surely, 2^28361387 is an apocalyptic number.

28361387 is a deficient number, since it is larger than the sum of its proper divisors (1).

28361387 is an equidigital number, since it uses as much as digits as its factorization.

28361387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 38.

The square root of 28361387 is about 5325.5410053815. The cubic root of 28361387 is about 304.9597259372.

The spelling of 28361387 in words is "twenty-eight million, three hundred sixty-one thousand, three hundred eighty-seven".