42943688 has 8 divisors (see below), whose sum is σ = 80519430. Its totient is φ = 21471840.

The previous prime is 42943651. The next prime is 42943697. The reversal of 42943688 is 88634924.

It can be written as a sum of positive squares in only one way, i.e., 42797764 + 145924 = 6542^2 + 382^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2683973 + ... + 2683988.

Almost surely, 2^42943688 is an apocalyptic number.

It is an amenable number.

42943688 is a deficient number, since it is larger than the sum of its proper divisors (37575742).

42943688 is a wasteful number, since it uses less digits than its factorization.

42943688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5367967 (or 5367963 counting only the distinct ones).

The product of its digits is 331776, while the sum is 44.

The square root of 42943688 is about 6553.1433678808. The cubic root of 42943688 is about 350.1868064001.

The spelling of 42943688 in words is "forty-two million, nine hundred forty-three thousand, six hundred eighty-eight".