23920540 has 48 divisors (see below), whose sum is σ = 58371264. Its totient is φ = 8064000.

The previous prime is 23920531. The next prime is 23920553. The reversal of 23920540 is 4502932.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7140 + ... + 9940.

It is an arithmetic number, because the mean of its divisors is an integer number (1216068).

Almost surely, 2^23920540 is an apocalyptic number.

23920540 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 23920540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29185632).

23920540 is an abundant number, since it is smaller than the sum of its proper divisors (34450724).

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

23920540 is a wasteful number, since it uses less digits than its factorization.

23920540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2878 (or 2876 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 23920540 is about 4890.8629095488. The cubic root of 23920540 is about 288.1312255640.

The spelling of 23920540 in words is "twenty-three million, nine hundred twenty thousand, five hundred forty".