12428776 has 8 divisors (see below), whose sum is σ = 23303970. Its totient is φ = 6214384.

The previous prime is 12428771. The next prime is 12428803. The reversal of 12428776 is 67782421.

It can be written as a sum of positive squares in only one way, i.e., 9771876 + 2656900 = 3126^2 + 1630^2 .

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 (37) 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 (12428771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776791 + ... + 776806.

Almost surely, 2^12428776 is an apocalyptic number.

It is an amenable number.

12428776 is a deficient number, since it is larger than the sum of its proper divisors (10875194).

12428776 is a wasteful number, since it uses less digits than its factorization.

12428776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553603 (or 1553599 counting only the distinct ones).

The product of its digits is 37632, while the sum is 37.

The square root of 12428776 is about 3525.4469220228. The cubic root of 12428776 is about 231.6378117942.

It can be divided in two parts, 124 and 28776, that added together give a square (28900 = 170²).

The spelling of 12428776 in words is "twelve million, four hundred twenty-eight thousand, seven hundred seventy-six".