23189790 has 64 divisors (see below), whose sum is σ = 60653376. Its totient is φ = 5640192.

The previous prime is 23189759. The next prime is 23189797. The reversal of 23189790 is 9798132.

23189790 = T₈₁₂ + T₈₁₃ + ... + T₈₇₆.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23189797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37524 + ... + 38136.

It is an arithmetic number, because the mean of its divisors is an integer number (947709).

Almost surely, 2^23189790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23189790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30326688).

23189790 is an abundant number, since it is smaller than the sum of its proper divisors (37463586).

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

23189790 is a wasteful number, since it uses less digits than its factorization.

23189790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 23189790 is about 4815.5778469463. The cubic root of 23189790 is about 285.1667844948.

The spelling of 23189790 in words is "twenty-three million, one hundred eighty-nine thousand, seven hundred ninety".