42220660 has 48 divisors (see below), whose sum is σ = 94127040. Its totient is φ = 15863040.

The previous prime is 42220643. The next prime is 42220669. The reversal of 42220660 is 6602224.

42220660 = T₄₉₁ + T₄₉₂ + ... + T₇₁₈.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42220669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51655 + ... + 52465.

It is an arithmetic number, because the mean of its divisors is an integer number (1960980).

Almost surely, 2^42220660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42220660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47063520).

42220660 is an abundant number, since it is smaller than the sum of its proper divisors (51906380).

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

42220660 is a wasteful number, since it uses less digits than its factorization.

42220660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976 (or 974 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 42220660 is about 6497.7426849638. The cubic root of 42220660 is about 348.2103475739.

Adding to 42220660 its reverse (6602224), we get a palindrome (48822884).

The spelling of 42220660 in words is "forty-two million, two hundred twenty thousand, six hundred sixty".