42631844 has 12 divisors (see below), whose sum is σ = 76622364. Its totient is φ = 20739744.

The previous prime is 42631843. The next prime is 42631859. The reversal of 42631844 is 44813624.

It can be written as a sum of positive squares in 2 ways, for example, as 14668900 + 27962944 = 3830^2 + 5288^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42631844.

It is not an unprimeable number, because it can be changed into a prime (42631843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143879 + ... + 144174.

It is an arithmetic number, because the mean of its divisors is an integer number (6385197).

Almost surely, 2^42631844 is an apocalyptic number.

It is an amenable number.

42631844 is a deficient number, since it is larger than the sum of its proper divisors (33990520).

42631844 is a wasteful number, since it uses less digits than its factorization.

42631844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288094 (or 288092 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The square root of 42631844 is about 6529.3065481719. The cubic root of 42631844 is about 349.3370962663.

The spelling of 42631844 in words is "forty-two million, six hundred thirty-one thousand, eight hundred forty-four".