22428998 has 4 divisors (see below), whose sum is σ = 33643500. Its totient is φ = 11214498.

The previous prime is 22428997. The next prime is 22429003. The reversal of 22428998 is 89982422.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22428997) 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 as a sum of consecutive naturals, namely, 5607248 + ... + 5607251.

It is an arithmetic number, because the mean of its divisors is an integer number (8410875).

Almost surely, 2^22428998 is an apocalyptic number.

22428998 is a deficient number, since it is larger than the sum of its proper divisors (11214502).

22428998 is a wasteful number, since it uses less digits than its factorization.

22428998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11214501.

The product of its digits is 165888, while the sum is 44.

The square root of 22428998 is about 4735.9263085483. The cubic root of 22428998 is about 282.0135382398.

The spelling of 22428998 in words is "twenty-two million, four hundred twenty-eight thousand, nine hundred ninety-eight".