42773866 has 8 divisors (see below), whose sum is σ = 64629540. Its totient is φ = 21230688.

The previous prime is 42773849. The next prime is 42773873. The reversal of 42773866 is 66837724.

It is a happy number.

42773866 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 2 ways, for example, as 41925625 + 848241 = 6475^2 + 921^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×42773866² = 3659207225171912, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 77781 + ... + 78328.

Almost surely, 2^42773866 is an apocalyptic number.

42773866 is a deficient number, since it is larger than the sum of its proper divisors (21855674).

42773866 is a wasteful number, since it uses less digits than its factorization.

42773866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156248.

The product of its digits is 338688, while the sum is 43.

The square root of 42773866 is about 6540.1732392957. The cubic root of 42773866 is about 349.7245887809.

The spelling of 42773866 in words is "forty-two million, seven hundred seventy-three thousand, eight hundred sixty-six".