23820890 has 16 divisors (see below), whose sum is σ = 44356680. Its totient is φ = 9199680.

The previous prime is 23820883. The next prime is 23820931. The reversal of 23820890 is 9802832.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13980121 + 9840769 = 3739^2 + 3137^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40781 + ... + 41360.

Almost surely, 2^23820890 is an apocalyptic number.

23820890 is a deficient number, since it is larger than the sum of its proper divisors (20535790).

23820890 is a wasteful number, since it uses less digits than its factorization.

23820890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82177.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 23820890 is about 4880.6649137182. The cubic root of 23820890 is about 287.7305623717.

The spelling of 23820890 in words is "twenty-three million, eight hundred twenty thousand, eight hundred ninety".