23220040 has 32 divisors (see below), whose sum is σ = 53136000. Its totient is φ = 9129664.

The previous prime is 23220037. The next prime is 23220047. The reversal of 23220040 is 4002232.

It is a self number, because there is not a number n which added to its sum of digits gives 23220040.

It is not an unprimeable number, because it can be changed into a prime (23220047) by changing a digit.

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, 2560 + ... + 7279.

It is an arithmetic number, because the mean of its divisors is an integer number (1660500).

Almost surely, 2^23220040 is an apocalyptic number.

23220040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23220040 is an abundant number, since it is smaller than the sum of its proper divisors (29915960).

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

23220040 is a wasteful number, since it uses less digits than its factorization.

23220040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9909 (or 9905 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 23220040 is about 4818.7176717463. The cubic root of 23220040 is about 285.2907262105.

Adding to 23220040 its reverse (4002232), we get a palindrome (27222272).

The spelling of 23220040 in words is "twenty-three million, two hundred twenty thousand, forty".