28123336 has 8 divisors (see below), whose sum is σ = 52731270. Its totient is φ = 14061664.

The previous prime is 28123283. The next prime is 28123339. The reversal of 28123336 is 63332182.

It can be written as a sum of positive squares in only one way, i.e., 17690436 + 10432900 = 4206^2 + 3230^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28123339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1757701 + ... + 1757716.

Almost surely, 2^28123336 is an apocalyptic number.

It is an amenable number.

28123336 is a deficient number, since it is larger than the sum of its proper divisors (24607934).

28123336 is a wasteful number, since it uses less digits than its factorization.

28123336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3515423 (or 3515419 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

The square root of 28123336 is about 5303.1439731540. The cubic root of 28123336 is about 304.1041021587.

The spelling of 28123336 in words is "twenty-eight million, one hundred twenty-three thousand, three hundred thirty-six".