42790222 has 8 divisors (see below), whose sum is σ = 65273400. Its totient is φ = 21032424.

The previous prime is 42790213. The next prime is 42790247. The reversal of 42790222 is 22209724.

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, 181197 + ... + 181432.

It is an arithmetic number, because the mean of its divisors is an integer number (8159175).

Almost surely, 2^42790222 is an apocalyptic number.

42790222 is a deficient number, since it is larger than the sum of its proper divisors (22483178).

42790222 is a wasteful number, since it uses less digits than its factorization.

42790222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362690.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 42790222 is about 6541.4235453760. The cubic root of 42790222 is about 349.7691593484.

Adding to 42790222 its reverse (22209724), we get a palindrome (64999946).

The spelling of 42790222 in words is "forty-two million, seven hundred ninety thousand, two hundred twenty-two".