42444402 has 128 divisors (see below), whose sum is σ = 117669888. Its totient is φ = 9849600.

The previous prime is 42444383. The next prime is 42444403. The reversal of 42444402 is 20444424.

42444402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×42444402² = 3603054522275208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42444403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 222127 + ... + 222317.

It is an arithmetic number, because the mean of its divisors is an integer number (919296).

Almost surely, 2^42444402 is an apocalyptic number.

42444402 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 42444402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58834944).

42444402 is an abundant number, since it is smaller than the sum of its proper divisors (75225486).

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

42444402 is a wasteful number, since it uses less digits than its factorization.

42444402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264.

The product of its (nonzero) digits is 4096, while the sum is 24.

The square root of 42444402 is about 6514.9368377598. The cubic root of 42444402 is about 348.8243602438.

Adding to 42444402 its reverse (20444424), we get a palindrome (62888826).

It can be divided in two parts, 4244 and 4402, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 42444402 in words is "forty-two million, four hundred forty-four thousand, four hundred two".