22309398 has 32 divisors (see below), whose sum is σ = 51179520. Its totient is φ = 7196040.

The previous prime is 22309387. The next prime is 22309421. The reversal of 22309398 is 89390322.

It is a super-3 number, since 3×22309398³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4990 + ... + 8337.

It is an arithmetic number, because the mean of its divisors is an integer number (1599360).

Almost surely, 2^22309398 is an apocalyptic number.

22309398 is an abundant number, since it is smaller than the sum of its proper divisors (28870122).

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

22309398 is a wasteful number, since it uses less digits than its factorization.

22309398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13369 (or 13363 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 22309398 is about 4723.2825450104. The cubic root of 22309398 is about 281.5113765729.

It can be divided in two parts, 2230 and 9398, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 22309398 in words is "twenty-two million, three hundred nine thousand, three hundred ninety-eight".