42783786 has 12 divisors (see below), whose sum is σ = 92698242. Its totient is φ = 14261256.

The previous prime is 42783743. The next prime is 42783799. The reversal of 42783786 is 68738724.

It is a happy number.

42783786 is a `hidden beast` number, since 4 + 278 + 378 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29322225 + 13461561 = 5415^2 + 3669^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 5 ways as a sum of consecutive naturals, for example, 1188421 + ... + 1188456.

Almost surely, 2^42783786 is an apocalyptic number.

42783786 is an abundant number, since it is smaller than the sum of its proper divisors (49914456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42783786 is a wasteful number, since it uses less digits than its factorization.

42783786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2376885 (or 2376882 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 42783786 is about 6540.9315850267. The cubic root of 42783786 is about 349.7516224199.

The spelling of 42783786 in words is "forty-two million, seven hundred eighty-three thousand, seven hundred eighty-six".