22002906 has 16 divisors (see below), whose sum is σ = 44100000. Its totient is φ = 7318608.

The previous prime is 22002899. The next prime is 22002907. The reversal of 22002906 is 60920022.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22002907) 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, 681 + ... + 6668.

It is an arithmetic number, because the mean of its divisors is an integer number (2756250).

Almost surely, 2^22002906 is an apocalyptic number.

22002906 is an abundant number, since it is smaller than the sum of its proper divisors (22097094).

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

22002906 is a wasteful number, since it uses less digits than its factorization.

22002906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7853.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 22002906 is about 4690.7255302352. The cubic root of 22002906 is about 280.2162699864.

Adding to 22002906 its reverse (60920022), we get a palindrome (82922928).

The spelling of 22002906 in words is "twenty-two million, two thousand, nine hundred six".