22404788 has 12 divisors (see below), whose sum is σ = 44809632. Its totient is φ = 9602040.

The previous prime is 22404787. The next prime is 22404803. The reversal of 22404788 is 88740422.

22404788 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22404787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400058 + ... + 400113.

It is an arithmetic number, because the mean of its divisors is an integer number (3734136).

Almost surely, 2^22404788 is an apocalyptic number.

22404788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22404788 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22404788 is a wasteful number, since it uses less digits than its factorization.

22404788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800182 (or 800180 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 22404788 is about 4733.3696242740. The cubic root of 22404788 is about 281.9120326531.

The spelling of 22404788 in words is "twenty-two million, four hundred four thousand, seven hundred eighty-eight".