28311485 has 4 divisors (see below), whose sum is σ = 33973788. Its totient is φ = 22649184.

The previous prime is 28311473. The next prime is 28311527. The reversal of 28311485 is 58411382.

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 3020644 + 25290841 = 1738^2 + 5029^2 .

It is a cyclic number.

It is not a de Polignac number, because 28311485 - 2⁶ = 28311421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2831144 + ... + 2831153.

It is an arithmetic number, because the mean of its divisors is an integer number (8493447).

Almost surely, 2^28311485 is an apocalyptic number.

It is an amenable number.

28311485 is a deficient number, since it is larger than the sum of its proper divisors (5662303).

28311485 is an equidigital number, since it uses as much as digits as its factorization.

28311485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5662302.

The product of its digits is 7680, while the sum is 32.

The square root of 28311485 is about 5320.8537848733. The cubic root of 28311485 is about 304.7807615537.

The spelling of 28311485 in words is "twenty-eight million, three hundred eleven thousand, four hundred eighty-five".