23381290 has 16 divisors (see below), whose sum is σ = 44562312. Its totient is φ = 8802304.

The previous prime is 23381269. The next prime is 23381297. The reversal of 23381290 is 9218332.

It can be written as a sum of positive squares in 4 ways, for example, as 23068809 + 312481 = 4803^2 + 559^2 .

It is not an unprimeable number, because it can be changed into a prime (23381297) 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, 68599 + ... + 68938.

Almost surely, 2^23381290 is an apocalyptic number.

23381290 is a deficient number, since it is larger than the sum of its proper divisors (21181022).

23381290 is a wasteful number, since it uses less digits than its factorization.

23381290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137561.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 23381290 is about 4835.4203540127. The cubic root of 23381290 is about 285.9495974557.

The spelling of 23381290 in words is "twenty-three million, three hundred eighty-one thousand, two hundred ninety".