22478398 has 8 divisors (see below), whose sum is σ = 33747120. Its totient is φ = 11229360.

The previous prime is 22478381. The next prime is 22478399. The reversal of 22478398 is 89387422.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22478399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1623 + ... + 6898.

It is an arithmetic number, because the mean of its divisors is an integer number (4218390).

Almost surely, 2^22478398 is an apocalyptic number.

22478398 is a deficient number, since it is larger than the sum of its proper divisors (11268722).

22478398 is a wasteful number, since it uses less digits than its factorization.

22478398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9842.

The product of its digits is 193536, while the sum is 43.

The square root of 22478398 is about 4741.1388927134. The cubic root of 22478398 is about 282.2204319114.

The spelling of 22478398 in words is "twenty-two million, four hundred seventy-eight thousand, three hundred ninety-eight".