42783988 has 36 divisors (see below), whose sum is σ = 83007372. Its totient is φ = 19180800.

The previous prime is 42783977. The next prime is 42784013. The reversal of 42783988 is 88938724.

42783988 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 6 ways, for example, as 7997584 + 34786404 = 2828^2 + 5898^2 .

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 70888 + ... + 71488.

Almost surely, 2^42783988 is an apocalyptic number.

It is an amenable number.

42783988 is a deficient number, since it is larger than the sum of its proper divisors (40223384).

42783988 is a wasteful number, since it uses less digits than its factorization.

42783988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692 (or 653 counting only the distinct ones).

The product of its digits is 774144, while the sum is 49.

The square root of 42783988 is about 6540.9470262340. The cubic root of 42783988 is about 349.7521728599.

The spelling of 42783988 in words is "forty-two million, seven hundred eighty-three thousand, nine hundred eighty-eight".