23406890 has 16 divisors (see below), whose sum is σ = 45373608. Its totient is φ = 8642496.

The previous prime is 23406883. The next prime is 23406899. The reversal of 23406890 is 9860432.

It can be written as a sum of positive squares in 4 ways, for example, as 19175641 + 4231249 = 4379^2 + 2057^2 .

It is not an unprimeable number, because it can be changed into a prime (23406899) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 89897 + ... + 90156.

Almost surely, 2^23406890 is an apocalyptic number.

23406890 is a deficient number, since it is larger than the sum of its proper divisors (21966718).

23406890 is a wasteful number, since it uses less digits than its factorization.

23406890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180073.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 23406890 is about 4838.0667626646. The cubic root of 23406890 is about 286.0539207510.

The spelling of 23406890 in words is "twenty-three million, four hundred six thousand, eight hundred ninety".