42783785 has 12 divisors (see below), whose sum is σ = 56432964. Its totient is φ = 31115040.

The previous prime is 42783743. The next prime is 42783799. The reversal of 42783785 is 58738724.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18498601 + 24285184 = 4301^2 + 4928^2 .

It is not a de Polignac number, because 42783785 - 2¹² = 42779689 is a prime.

It is a Duffinian number.

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 in 11 ways as a sum of consecutive naturals, for example, 34754 + ... + 35963.

It is an arithmetic number, because the mean of its divisors is an integer number (4702747).

Almost surely, 2^42783785 is an apocalyptic number.

It is an amenable number.

42783785 is a deficient number, since it is larger than the sum of its proper divisors (13649179).

42783785 is a wasteful number, since it uses less digits than its factorization.

42783785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70744 (or 70733 counting only the distinct ones).

The product of its digits is 376320, while the sum is 44.

The square root of 42783785 is about 6540.9315085850. The cubic root of 42783785 is about 349.7516196950.

The spelling of 42783785 in words is "forty-two million, seven hundred eighty-three thousand, seven hundred eighty-five".