23242140 has 60 divisors (see below), whose sum is σ = 72916536. Its totient is φ = 6197472.

The previous prime is 23242129. The next prime is 23242169. The reversal of 23242140 is 4124232.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5554 + ... + 8793.

Almost surely, 2^23242140 is an apocalyptic number.

23242140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23242140 is an abundant number, since it is smaller than the sum of its proper divisors (49674396).

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

23242140 is a wasteful number, since it uses less digits than its factorization.

23242140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14368 (or 14357 counting only the distinct ones).

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

The square root of 23242140 is about 4821.0102675684. The cubic root of 23242140 is about 285.3812073328.

Adding to 23242140 its reverse (4124232), we get a palindrome (27366372).

The spelling of 23242140 in words is "twenty-three million, two hundred forty-two thousand, one hundred forty".