22404816 has 160 divisors (see below), whose sum is σ = 76185600. Its totient is φ = 6168960.

The previous prime is 22404803. The next prime is 22404859. The reversal of 22404816 is 61840422.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 22404816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93625 + ... + 93863.

It is an arithmetic number, because the mean of its divisors is an integer number (476160).

Almost surely, 2^22404816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22404816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38092800).

22404816 is an abundant number, since it is smaller than the sum of its proper divisors (53780784).

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

22404816 is a wasteful number, since it uses less digits than its factorization.

22404816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 22404816 is about 4733.3725819969. The cubic root of 22404816 is about 281.9121500913.

It can be divided in two parts, 22404 and 816, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 22404816 in words is "twenty-two million, four hundred four thousand, eight hundred sixteen".