23990142 has 32 divisors (see below), whose sum is σ = 52865280. Its totient is φ = 7197120.

The previous prime is 23990129. The next prime is 23990143. The reversal of 23990142 is 24109932.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23990143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5034 + ... + 8562.

It is an arithmetic number, because the mean of its divisors is an integer number (1652040).

Almost surely, 2^23990142 is an apocalyptic number.

23990142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 23990142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26432640).

23990142 is an abundant number, since it is smaller than the sum of its proper divisors (28875138).

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

23990142 is a wasteful number, since it uses less digits than its factorization.

23990142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3648.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 23990142 is about 4897.9732543165. The cubic root of 23990142 is about 288.4104150522.

The spelling of 23990142 in words is "twenty-three million, nine hundred ninety thousand, one hundred forty-two".