23857120 has 144 divisors (see below), whose sum is σ = 69809040. Its totient is φ = 7655424.

The previous prime is 23857117. The next prime is 23857123. The reversal of 23857120 is 2175832.

It is an interprime number because it is at equal distance from previous prime (23857117) and next prime (23857123).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23857123) 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 23 ways as a sum of consecutive naturals, for example, 133191 + ... + 133369.

It is an arithmetic number, because the mean of its divisors is an integer number (484785).

Almost surely, 2^23857120 is an apocalyptic number.

23857120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23857120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34904520).

23857120 is an abundant number, since it is smaller than the sum of its proper divisors (45951920).

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

23857120 is a wasteful number, since it uses less digits than its factorization.

23857120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 23857120 is about 4884.3750879718. The cubic root of 23857120 is about 287.8763615386.

The spelling of 23857120 in words is "twenty-three million, eight hundred fifty-seven thousand, one hundred twenty".