28053666 has 24 divisors (see below), whose sum is σ = 61052940. Its totient is φ = 9309696.

The previous prime is 28053631. The next prime is 28053677. The reversal of 28053666 is 66635082.

It can be written as a sum of positive squares in 2 ways, for example, as 28037025 + 16641 = 5295^2 + 129^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28053666.

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, 850 + ... + 7538.

Almost surely, 2^28053666 is an apocalyptic number.

28053666 is an abundant number, since it is smaller than the sum of its proper divisors (32999274).

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

28053666 is a wasteful number, since it uses less digits than its factorization.

28053666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6930 (or 6927 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 28053666 is about 5296.5711550021. The cubic root of 28053666 is about 303.8527752607.

The spelling of 28053666 in words is "twenty-eight million, fifty-three thousand, six hundred sixty-six".