22509998 has 8 divisors (see below), whose sum is σ = 38588592. Its totient is φ = 9647136.

The previous prime is 22509983. The next prime is 22510043. The reversal of 22509998 is 89990522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 803915 + ... + 803942.

It is an arithmetic number, because the mean of its divisors is an integer number (4823574).

Almost surely, 2^22509998 is an apocalyptic number.

22509998 is a deficient number, since it is larger than the sum of its proper divisors (16078594).

22509998 is a wasteful number, since it uses less digits than its factorization.

22509998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607866.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 22509998 is about 4744.4702549389. The cubic root of 22509998 is about 282.3526179309.

The spelling of 22509998 in words is "twenty-two million, five hundred nine thousand, nine hundred ninety-eight".