23040240 has 40 divisors (see below), whose sum is σ = 71425488. Its totient is φ = 6144000.

The previous prime is 23040229. The next prime is 23040247. The reversal of 23040240 is 4204032.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23040247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47761 + ... + 48240.

Almost surely, 2^23040240 is an apocalyptic number.

23040240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23040240 is an abundant number, since it is smaller than the sum of its proper divisors (48385248).

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

23040240 is a wasteful number, since it uses less digits than its factorization.

23040240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96017 (or 96011 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 23040240 is about 4800.0249999349. The cubic root of 23040240 is about 284.5524523817.

Adding to 23040240 its reverse (4204032), we get a palindrome (27244272).

It can be divided in two parts, 230 and 40240, that added together give a triangular number (40470 = T₂₈₄).

The spelling of 23040240 in words is "twenty-three million, forty thousand, two hundred forty".