23700240 has 60 divisors (see below), whose sum is σ = 79595724. Its totient is φ = 6319872.

The previous prime is 23700223. The next prime is 23700247. The reversal of 23700240 is 4200732.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10653696 + 13046544 = 3264^2 + 3612^2 .

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 not an unprimeable number, because it can be changed into a prime (23700247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15739 + ... + 17178.

Almost surely, 2^23700240 is an apocalyptic number.

23700240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23700240 is an abundant number, since it is smaller than the sum of its proper divisors (55895484).

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

23700240 is a wasteful number, since it uses less digits than its factorization.

23700240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32936 (or 32927 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 23700240 is about 4868.2892272337. The cubic root of 23700240 is about 287.2439661329.

Adding to 23700240 its reverse (4200732), we get a palindrome (27900972).

The spelling of 23700240 in words is "twenty-three million, seven hundred thousand, two hundred forty".