42331290 has 16 divisors (see below), whose sum is σ = 101595168. Its totient is φ = 11288336.

The previous prime is 42331283. The next prime is 42331291. The reversal of 42331290 is 9213324.

42331290 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 2×42331290² = 3583876226128200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 42331290.

It is not an unprimeable number, because it can be changed into a prime (42331291) 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 7 ways as a sum of consecutive naturals, for example, 705492 + ... + 705551.

It is an arithmetic number, because the mean of its divisors is an integer number (6349698).

Almost surely, 2^42331290 is an apocalyptic number.

42331290 is an abundant number, since it is smaller than the sum of its proper divisors (59263878).

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

42331290 is a wasteful number, since it uses less digits than its factorization.

42331290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411053.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 42331290 is about 6506.2500720461. The cubic root of 42331290 is about 348.5142186569.

It can be divided in two parts, 423 and 31290, that added together give a palindrome (31713).

The spelling of 42331290 in words is "forty-two million, three hundred thirty-one thousand, two hundred ninety".