22012308 has 18 divisors (see below), whose sum is σ = 55642314. Its totient is φ = 7337424.

The previous prime is 22012303. The next prime is 22012321. The reversal of 22012308 is 80321022.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21511044 + 501264 = 4638^2 + 708^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 305691 + ... + 305762.

Almost surely, 2^22012308 is an apocalyptic number.

It is an amenable number.

22012308 is an abundant number, since it is smaller than the sum of its proper divisors (33630006).

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

22012308 is a wasteful number, since it uses less digits than its factorization.

22012308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611463 (or 611458 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 22012308 is about 4691.7276135769. The cubic root of 22012308 is about 280.2561771120.

The spelling of 22012308 in words is "twenty-two million, twelve thousand, three hundred eight".