28152485 has 4 divisors (see below), whose sum is σ = 33782988. Its totient is φ = 22521984.

The previous prime is 28152479. The next prime is 28152497. The reversal of 28152485 is 58425182.

It is a happy number.

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 18653761 + 9498724 = 4319^2 + 3082^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28152485 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2815244 + ... + 2815253.

It is an arithmetic number, because the mean of its divisors is an integer number (8445747).

Almost surely, 2^28152485 is an apocalyptic number.

It is an amenable number.

28152485 is a deficient number, since it is larger than the sum of its proper divisors (5630503).

28152485 is an equidigital number, since it uses as much as digits as its factorization.

28152485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5630502.

The product of its digits is 25600, while the sum is 35.

The square root of 28152485 is about 5305.8915367731. The cubic root of 28152485 is about 304.2091308283.

The spelling of 28152485 in words is "twenty-eight million, one hundred fifty-two thousand, four hundred eighty-five".