28318485407 has 4 divisors (see below), whose sum is σ = 28391283960. Its totient is φ = 28245686856.

The previous prime is 28318485389. The next prime is 28318485409. The reversal of 28318485407 is 70458481382.

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

It is a cyclic number.

It is not a de Polignac number, because 28318485407 - 2³² = 24023518111 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 (28318485409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36398693 + ... + 36399470.

It is an arithmetic number, because the mean of its divisors is an integer number (7097820990).

Almost surely, 2^28318485407 is an apocalyptic number.

28318485407 is a deficient number, since it is larger than the sum of its proper divisors (72798553).

28318485407 is an equidigital number, since it uses as much as digits as its factorization.

28318485407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72798552.

The product of its (nonzero) digits is 1720320, while the sum is 50.

The spelling of 28318485407 in words is "twenty-eight billion, three hundred eighteen million, four hundred eighty-five thousand, four hundred seven".