22660389 has 6 divisors (see below), whose sum is σ = 32731686. Its totient is φ = 15106920.

The previous prime is 22660381. The next prime is 22660399. The reversal of 22660389 is 98306622.

It can be written as a sum of positive squares in only one way, i.e., 20629764 + 2030625 = 4542^2 + 1425^2 .

It is not a de Polignac number, because 22660389 - 2³ = 22660381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22660381) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1258902 + ... + 1258919.

It is an arithmetic number, because the mean of its divisors is an integer number (5455281).

Almost surely, 2^22660389 is an apocalyptic number.

It is an amenable number.

22660389 is a deficient number, since it is larger than the sum of its proper divisors (10071297).

22660389 is a wasteful number, since it uses less digits than its factorization.

22660389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2517827 (or 2517824 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 22660389 is about 4760.2929531700. The cubic root of 22660389 is about 282.9800291401.

The spelling of 22660389 in words is "twenty-two million, six hundred sixty thousand, three hundred eighty-nine".