23102442 has 128 divisors (see below), whose sum is σ = 62208000. Its totient is φ = 6272640.

The previous prime is 23102413. The next prime is 23102449. The reversal of 23102442 is 24420132.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (23102449) 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 63 ways as a sum of consecutive naturals, for example, 259534 + ... + 259622.

It is an arithmetic number, because the mean of its divisors is an integer number (486000).

Almost surely, 2^23102442 is an apocalyptic number.

23102442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a pronic number, being equal to 4806×4807.

It is a practical number, because each smaller number is the sum of distinct divisors of 23102442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31104000).

23102442 is an abundant number, since it is smaller than the sum of its proper divisors (39105558).

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

23102442 is a wasteful number, since it uses less digits than its factorization.

23102442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 23102442 is about 4806.4999739936. The cubic root of 23102442 is about 284.8082921275.

Adding to 23102442 its reverse (24420132), we get a palindrome (47522574).

The spelling of 23102442 in words is "twenty-three million, one hundred two thousand, four hundred forty-two".