23516240 has 40 divisors (see below), whose sum is σ = 59647968. Its totient is φ = 8551040.

The previous prime is 23516237. The next prime is 23516257. The reversal of 23516240 is 4261532.

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

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12482 + ... + 14241.

Almost surely, 2^23516240 is an apocalyptic number.

23516240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23516240 is an abundant number, since it is smaller than the sum of its proper divisors (36131728).

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

23516240 is a wasteful number, since it uses less digits than its factorization.

23516240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26747 (or 26741 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 23516240 is about 4849.3545962324. The cubic root of 23516240 is about 286.4986817024.

Adding to 23516240 its reverse (4261532), we get a palindrome (27777772).

The spelling of 23516240 in words is "twenty-three million, five hundred sixteen thousand, two hundred forty".