22438478 has 8 divisors (see below), whose sum is σ = 35121168. Its totient is φ = 10731424.

The previous prime is 22438459. The next prime is 22438511. The reversal of 22438478 is 87483422.

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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243851 + ... + 243942.

It is an arithmetic number, because the mean of its divisors is an integer number (4390146).

Almost surely, 2^22438478 is an apocalyptic number.

22438478 is a deficient number, since it is larger than the sum of its proper divisors (12682690).

22438478 is a wasteful number, since it uses less digits than its factorization.

22438478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487818.

The product of its digits is 86016, while the sum is 38.

The square root of 22438478 is about 4736.9270629808. The cubic root of 22438478 is about 282.0532652599.

The spelling of 22438478 in words is "twenty-two million, four hundred thirty-eight thousand, four hundred seventy-eight".