22406688 has 36 divisors (see below), whose sum is σ = 63719838. Its totient is φ = 7468800.

The previous prime is 22406653. The next prime is 22406701. The reversal of 22406688 is 88660422.

It can be written as a sum of positive squares in only one way, i.e., 18766224 + 3640464 = 4332^2 + 1908^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 38613 + ... + 39188.

Almost surely, 2^22406688 is an apocalyptic number.

It is an amenable number.

22406688 is an abundant number, since it is smaller than the sum of its proper divisors (41313150).

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

22406688 is a wasteful number, since it uses less digits than its factorization.

22406688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77817 (or 77806 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 22406688 is about 4733.5703227057. The cubic root of 22406688 is about 281.9200014516.

The spelling of 22406688 in words is "twenty-two million, four hundred six thousand, six hundred eighty-eight".