28126566 has 24 divisors (see below), whose sum is σ = 65629200. Its totient is φ = 8654256.

The previous prime is 28126547. The next prime is 28126577. The reversal of 28126566 is 66562182.

It is a super-2 number, since 2×28126566² = 1582207429904712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28126566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59866 + ... + 60333.

It is an arithmetic number, because the mean of its divisors is an integer number (2734550).

Almost surely, 2^28126566 is an apocalyptic number.

28126566 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28126566 is an abundant number, since it is smaller than the sum of its proper divisors (37502634).

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

28126566 is a wasteful number, since it uses less digits than its factorization.

28126566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120220 (or 120217 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 28126566 is about 5303.4485007399. The cubic root of 28126566 is about 304.1157439574.

The spelling of 28126566 in words is "twenty-eight million, one hundred twenty-six thousand, five hundred sixty-six".