22278938 has 8 divisors (see below), whose sum is σ = 36456480. Its totient is φ = 10126780.

The previous prime is 22278937. The next prime is 22278941. The reversal of 22278938 is 83987222.

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

It is a junction number, because it is equal to n+sod(n) for n = 22278895 and 22278904.

It is not an unprimeable number, because it can be changed into a prime (22278937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 506318 + ... + 506361.

It is an arithmetic number, because the mean of its divisors is an integer number (4557060).

Almost surely, 2^22278938 is an apocalyptic number.

22278938 is a deficient number, since it is larger than the sum of its proper divisors (14177542).

22278938 is a wasteful number, since it uses less digits than its factorization.

22278938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012692.

The product of its digits is 96768, while the sum is 41.

The square root of 22278938 is about 4720.0569911814. The cubic root of 22278938 is about 281.3831982744.

The spelling of 22278938 in words is "twenty-two million, two hundred seventy-eight thousand, nine hundred thirty-eight".