28447475 has 12 divisors (see below), whose sum is σ = 40314384. Its totient is φ = 19506720.

The previous prime is 28447451. The next prime is 28447483. The reversal of 28447475 is 57474482.

It is a happy number.

It is not a de Polignac number, because 28447475 - 2¹² = 28443379 is a prime.

It is a Duffinian 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 11 ways as a sum of consecutive naturals, for example, 81104 + ... + 81453.

It is an arithmetic number, because the mean of its divisors is an integer number (3359532).

Almost surely, 2^28447475 is an apocalyptic number.

28447475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28447475 is a deficient number, since it is larger than the sum of its proper divisors (11866909).

28447475 is a wasteful number, since it uses less digits than its factorization.

28447475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162574 (or 162569 counting only the distinct ones).

The product of its digits is 250880, while the sum is 41.

The square root of 28447475 is about 5333.6174403495. The cubic root of 28447475 is about 305.2679719629.

The spelling of 28447475 in words is "twenty-eight million, four hundred forty-seven thousand, four hundred seventy-five".