42820444 has 6 divisors (see below), whose sum is σ = 74935784. Its totient is φ = 21410220.

The previous prime is 42820423. The next prime is 42820451. The reversal of 42820444 is 44402824.

42820444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 as a sum of consecutive naturals, namely, 5352552 + ... + 5352559.

Almost surely, 2^42820444 is an apocalyptic number.

It is an amenable number.

42820444 is a deficient number, since it is larger than the sum of its proper divisors (32115340).

42820444 is a wasteful number, since it uses less digits than its factorization.

42820444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10705115 (or 10705113 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

The square root of 42820444 is about 6543.7331852697. The cubic root of 42820444 is about 349.8514852893.

It can be divided in two parts, 42820 and 444, that added together give a square (43264 = 208²).

The spelling of 42820444 in words is "forty-two million, eight hundred twenty thousand, four hundred forty-four".