22152840 has 32 divisors (see below), whose sum is σ = 66458880. Its totient is φ = 5907392.

The previous prime is 22152829. The next prime is 22152863. The reversal of 22152840 is 4825122.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22152840.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92184 + ... + 92423.

It is an arithmetic number, because the mean of its divisors is an integer number (2076840).

Almost surely, 2^22152840 is an apocalyptic number.

22152840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22152840 is an abundant number, since it is smaller than the sum of its proper divisors (44306040).

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

22152840 is a wasteful number, since it uses less digits than its factorization.

22152840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184621 (or 184617 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 22152840 is about 4706.6803588092. The cubic root of 22152840 is about 280.8513205603.

Adding to 22152840 its reverse (4825122), we get a palindrome (26977962).

The spelling of 22152840 in words is "twenty-two million, one hundred fifty-two thousand, eight hundred forty".