28167385 has 24 divisors (see below), whose sum is σ = 36449496. Its totient is φ = 20889600.

The previous prime is 28167383. The next prime is 28167427. The reversal of 28167385 is 58376182.

It can be written as a sum of positive squares in 12 ways, for example, as 3136 + 28164249 = 56^2 + 5307^2 .

It is not a de Polignac number, because 28167385 - 2¹ = 28167383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28167383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145849 + ... + 146041.

It is an arithmetic number, because the mean of its divisors is an integer number (1518729).

Almost surely, 2^28167385 is an apocalyptic number.

It is an amenable number.

28167385 is a deficient number, since it is larger than the sum of its proper divisors (8282111).

28167385 is a wasteful number, since it uses less digits than its factorization.

28167385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 316 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 28167385 is about 5307.2954506038. The cubic root of 28167385 is about 304.2627899946.

It can be divided in two parts, 2816 and 7385, that added together give a palindrome (10201).

The spelling of 28167385 in words is "twenty-eight million, one hundred sixty-seven thousand, three hundred eighty-five".