72061768 has 16 divisors (see below), whose sum is σ = 137665980. Its totient is φ = 35350848.

The previous prime is 72061757. The next prime is 72061819. The reversal of 72061768 is 86716027.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 66945124 + 5116644 = 8182^2 + 2262^2 .

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 3 ways as a sum of consecutive naturals, for example, 84555 + ... + 85402.

Almost surely, 2^72061768 is an apocalyptic number.

It is an amenable number.

72061768 is a deficient number, since it is larger than the sum of its proper divisors (65604212).

72061768 is a wasteful number, since it uses less digits than its factorization.

72061768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170016 (or 170012 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 72061768 is about 8488.9203082606. The cubic root of 72061768 is about 416.1356959935.

The spelling of 72061768 in words is "seventy-two million, sixty-one thousand, seven hundred sixty-eight".