22646988 has 144 divisors (see below), whose sum is σ = 73056256. Its totient is φ = 5754240.

The previous prime is 22646983. The next prime is 22646989. The reversal of 22646988 is 88964622.

It is not an unprimeable number, because it can be changed into a prime (22646983) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 101445 + ... + 101667.

Almost surely, 2^22646988 is an apocalyptic number.

22646988 is a gapful number since it is divisible by the number (28) 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 22646988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36528128).

22646988 is an abundant number, since it is smaller than the sum of its proper divisors (50409268).

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

22646988 is a wasteful number, since it uses less digits than its factorization.

22646988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 279 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 22646988 is about 4758.8851635651. The cubic root of 22646988 is about 282.9242348174.

The spelling of 22646988 in words is "twenty-two million, six hundred forty-six thousand, nine hundred eighty-eight".