22278396 has 48 divisors (see below), whose sum is σ = 59661056. Its totient is φ = 6338304.

The previous prime is 22278383. The next prime is 22278407. The reversal of 22278396 is 69387222.

22278396 = 70² + 71² + ... + 406².

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27915 + ... + 28701.

Almost surely, 2^22278396 is an apocalyptic number.

It is an amenable number.

22278396 is an abundant number, since it is smaller than the sum of its proper divisors (37382660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22278396 is a wasteful number, since it uses less digits than its factorization.

22278396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138 (or 1136 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 22278396 is about 4719.9995762712. Note that the first 3 decimals coincide. The cubic root of 22278396 is about 281.3809164342.

The spelling of 22278396 in words is "twenty-two million, two hundred seventy-eight thousand, three hundred ninety-six".