42881090 has 32 divisors (see below), whose sum is σ = 89216640. Its totient is φ = 14534784.

The previous prime is 42881077. The next prime is 42881093. The reversal of 42881090 is 9018824.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (42881093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2789 + ... + 9671.

It is an arithmetic number, because the mean of its divisors is an integer number (2788020).

Almost surely, 2^42881090 is an apocalyptic number.

42881090 is an abundant number, since it is smaller than the sum of its proper divisors (46335550).

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

42881090 is a wasteful number, since it uses less digits than its factorization.

42881090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6986.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 42881090 is about 6548.3654449030. The cubic root of 42881090 is about 350.0165706440.

It can be divided in two parts, 428 and 81090, that added together give a palindrome (81518).

The spelling of 42881090 in words is "forty-two million, eight hundred eighty-one thousand, ninety".