42222990 has 64 divisors (see below), whose sum is σ = 105380352. Its totient is φ = 10819200.

The previous prime is 42222979. The next prime is 42223007. The reversal of 42222990 is 9922224.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91360 + ... + 91820.

It is an arithmetic number, because the mean of its divisors is an integer number (1646568).

Almost surely, 2^42222990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42222990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52690176).

42222990 is an abundant number, since it is smaller than the sum of its proper divisors (63157362).

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

42222990 is a wasteful number, since it uses less digits than its factorization.

42222990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 42222990 is about 6497.9219755242. The cubic root of 42222990 is about 348.2167529308.

The spelling of 42222990 in words is "forty-two million, two hundred twenty-two thousand, nine hundred ninety".