23280660 has 72 divisors (see below), whose sum is σ = 76057800. Its totient is φ = 5730048.

The previous prime is 23280641. The next prime is 23280671. The reversal of 23280660 is 6608232.

It can be written as a sum of positive squares in 4 ways, for example, as 125316 + 23155344 = 354^2 + 4812^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2635 + ... + 7314.

Almost surely, 2^23280660 is an apocalyptic number.

23280660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23280660 is an abundant number, since it is smaller than the sum of its proper divisors (52777140).

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

23280660 is a wasteful number, since it uses less digits than its factorization.

23280660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9977 (or 9972 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 23280660 is about 4825.0036269416. The cubic root of 23280660 is about 285.5387776875.

Adding to 23280660 its reverse (6608232), we get a palindrome (29888892).

The spelling of 23280660 in words is "twenty-three million, two hundred eighty thousand, six hundred sixty".