22222478 has 8 divisors (see below), whose sum is σ = 33354840. Its totient is φ = 11104200.

The previous prime is 22222471. The next prime is 22222481. The reversal of 22222478 is 87422222.

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

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 22222478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222471) 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, 2453 + ... + 7103.

It is an arithmetic number, because the mean of its divisors is an integer number (4169355).

Almost surely, 2^22222478 is an apocalyptic number.

22222478 is a deficient number, since it is larger than the sum of its proper divisors (11132362).

22222478 is a wasteful number, since it uses less digits than its factorization.

22222478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7042.

The product of its digits is 7168, while the sum is 29.

The square root of 22222478 is about 4714.0723371624. The cubic root of 22222478 is about 281.1453004198.

The spelling of 22222478 in words is "twenty-two million, two hundred twenty-two thousand, four hundred seventy-eight".