22129902 has 16 divisors (see below), whose sum is σ = 49177680. Its totient is φ = 7376616.

The previous prime is 22129901. The next prime is 22129931. The reversal of 22129902 is 20992122.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22129901) 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, 204853 + ... + 204960.

It is an arithmetic number, because the mean of its divisors is an integer number (3073605).

Almost surely, 2^22129902 is an apocalyptic number.

22129902 is an abundant number, since it is smaller than the sum of its proper divisors (27047778).

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

22129902 is a wasteful number, since it uses less digits than its factorization.

22129902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409824 (or 409818 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 22129902 is about 4704.2429784185. The cubic root of 22129902 is about 280.7543519193.

The spelling of 22129902 in words is "twenty-two million, one hundred twenty-nine thousand, nine hundred two".