22646739 has 8 divisors (see below), whose sum is σ = 30271120. Its totient is φ = 15060096.

The previous prime is 22646711. The next prime is 22646747. The reversal of 22646739 is 93764622.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22646739 - 2⁸ = 22646483 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22646697 and 22646706.

It is not an unprimeable number, because it can be changed into a prime (22646749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8002 + ... + 10455.

It is an arithmetic number, because the mean of its divisors is an integer number (3783890).

Almost surely, 2^22646739 is an apocalyptic number.

22646739 is a deficient number, since it is larger than the sum of its proper divisors (7624381).

22646739 is a wasteful number, since it uses less digits than its factorization.

22646739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18869.

The product of its digits is 108864, while the sum is 39.

The square root of 22646739 is about 4758.8590019037. The cubic root of 22646739 is about 282.9231979114.

The spelling of 22646739 in words is "twenty-two million, six hundred forty-six thousand, seven hundred thirty-nine".