23012240 has 40 divisors (see below), whose sum is σ = 53835840. Its totient is φ = 9147776.

The previous prime is 23012239. The next prime is 23012243. The reversal of 23012240 is 4221032.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (23012243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13517 + ... + 15123.

It is an arithmetic number, because the mean of its divisors is an integer number (1345896).

Almost surely, 2^23012240 is an apocalyptic number.

23012240 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 23012240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26917920).

23012240 is an abundant number, since it is smaller than the sum of its proper divisors (30823600).

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

23012240 is a wasteful number, since it uses less digits than its factorization.

23012240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799 (or 1793 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 23012240 is about 4797.1074617940. The cubic root of 23012240 is about 284.4371367661.

Adding to 23012240 its reverse (4221032), we get a palindrome (27233272).

The spelling of 23012240 in words is "twenty-three million, twelve thousand, two hundred forty".