42786628 has 6 divisors (see below), whose sum is σ = 74876606. Its totient is φ = 21393312.

The previous prime is 42786619. The next prime is 42786631. The reversal of 42786628 is 82668724.

42786628 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 only one way, i.e., 30382144 + 12404484 = 5512^2 + 3522^2 .

It is a super-2 number, since 2×42786628² = 3661391071220768, 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 as a sum of consecutive naturals, namely, 5348325 + ... + 5348332.

Almost surely, 2^42786628 is an apocalyptic number.

It is an amenable number.

42786628 is a deficient number, since it is larger than the sum of its proper divisors (32089978).

42786628 is a wasteful number, since it uses less digits than its factorization.

42786628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10696661 (or 10696659 counting only the distinct ones).

The product of its digits is 258048, while the sum is 43.

The square root of 42786628 is about 6541.1488287609. The cubic root of 42786628 is about 349.7593665694.

The spelling of 42786628 in words is "forty-two million, seven hundred eighty-six thousand, six hundred twenty-eight".