22776444 has 48 divisors (see below), whose sum is σ = 60963840. Its totient is φ = 7346160.

The previous prime is 22776437. The next prime is 22776451. The reversal of 22776444 is 44467722.

It is a happy number.

22776444 is a `hidden beast` number, since 2 + 2 + 7 + 7 + 644 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (22776437) and next prime (22776451).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 22776399 and 22776408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54 + ... + 6749.

It is an arithmetic number, because the mean of its divisors is an integer number (1270080).

Almost surely, 2^22776444 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 22776444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30481920).

22776444 is an abundant number, since it is smaller than the sum of its proper divisors (38187396).

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

22776444 is a wasteful number, since it uses less digits than its factorization.

22776444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6847 (or 6839 counting only the distinct ones).

The product of its digits is 75264, while the sum is 36.

The square root of 22776444 is about 4772.4672864253. The cubic root of 22776444 is about 283.4623000735.

It can be divided in two parts, 22776 and 444, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 22776444 in words is "twenty-two million, seven hundred seventy-six thousand, four hundred forty-four".