22487520 has 96 divisors (see below), whose sum is σ = 77293440. Its totient is φ = 5450240.

The previous prime is 22487519. The next prime is 22487539. The reversal of 22487520 is 2578422.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

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 15 ways as a sum of consecutive naturals, for example, 3151 + ... + 7409.

It is an arithmetic number, because the mean of its divisors is an integer number (805140).

Almost surely, 2^22487520 is an apocalyptic number.

22487520 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 22487520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38646720).

22487520 is an abundant number, since it is smaller than the sum of its proper divisors (54805920).

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

22487520 is a wasteful number, since it uses less digits than its factorization.

22487520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4288 (or 4280 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 22487520 is about 4742.1008002783. The cubic root of 22487520 is about 282.2586028791.

The spelling of 22487520 in words is "twenty-two million, four hundred eighty-seven thousand, five hundred twenty".