42431944 has 8 divisors (see below), whose sum is σ = 79559910. Its totient is φ = 21215968.

The previous prime is 42431923. The next prime is 42431947. The reversal of 42431944 is 44913424.

42431944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 40576900 + 1855044 = 6370^2 + 1362^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (42431947) 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 as a sum of consecutive naturals, namely, 2651989 + ... + 2652004.

Almost surely, 2^42431944 is an apocalyptic number.

It is an amenable number.

42431944 is a deficient number, since it is larger than the sum of its proper divisors (37127966).

42431944 is a wasteful number, since it uses less digits than its factorization.

42431944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5303999 (or 5303995 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 42431944 is about 6513.9806570176. The cubic root of 42431944 is about 348.7902286983.

The spelling of 42431944 in words is "forty-two million, four hundred thirty-one thousand, nine hundred forty-four".