28617426 has 48 divisors (see below), whose sum is σ = 67282488. Its totient is φ = 8755200.

The previous prime is 28617397. The next prime is 28617427. The reversal of 28617426 is 62471682.

It can be written as a sum of positive squares in 4 ways, for example, as 22610025 + 6007401 = 4755^2 + 2451^2 .

It is not an unprimeable number, because it can be changed into a prime (28617427) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 11406 + ... + 13686.

Almost surely, 2^28617426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28617426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33641244).

28617426 is an abundant number, since it is smaller than the sum of its proper divisors (38665062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28617426 is a wasteful number, since it uses less digits than its factorization.

28617426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347 (or 2344 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 28617426 is about 5349.5257733747. The cubic root of 28617426 is about 305.8746763490.

The spelling of 28617426 in words is "twenty-eight million, six hundred seventeen thousand, four hundred twenty-six".