42082816 has 20 divisors (see below), whose sum is σ = 84084462. Its totient is φ = 21041152.

The previous prime is 42082811. The next prime is 42082819. The reversal of 42082816 is 61828024.

It can be written as a sum of positive squares in only one way, i.e., 41990400 + 92416 = 6480^2 + 304^2 .

It is not an unprimeable number, because it can be changed into a prime (42082811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40585 + ... + 41608.

Almost surely, 2^42082816 is an apocalyptic number.

It is an amenable number.

42082816 is a deficient number, since it is larger than the sum of its proper divisors (42001646).

42082816 is an frugal number, since it uses more digits than its factorization.

42082816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82211 (or 82195 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 42082816 is about 6487.1269449580. The cubic root of 42082816 is about 347.8309832354.

The spelling of 42082816 in words is "forty-two million, eighty-two thousand, eight hundred sixteen".