23620240 has 40 divisors (see below), whose sum is σ = 62763840. Its totient is φ = 8098176.

The previous prime is 23620229. The next prime is 23620243. The reversal of 23620240 is 4202632.

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 (23620243) 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, 20530 + ... + 21649.

It is an arithmetic number, because the mean of its divisors is an integer number (1569096).

Almost surely, 2^23620240 is an apocalyptic number.

23620240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23620240 is an abundant number, since it is smaller than the sum of its proper divisors (39143600).

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

23620240 is a wasteful number, since it uses less digits than its factorization.

23620240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42199 (or 42193 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 23620240 is about 4860.0658431754. The cubic root of 23620240 is about 286.9204051110.

Adding to 23620240 its reverse (4202632), we get a palindrome (27822872).

The spelling of 23620240 in words is "twenty-three million, six hundred twenty thousand, two hundred forty".