76720306 has 16 divisors (see below), whose sum is σ = 124385688. Its totient is φ = 35280000.

The previous prime is 76720291. The next prime is 76720327. The reversal of 76720306 is 60302767.

It can be written as a sum of positive squares in 4 ways, for example, as 51969681 + 24750625 = 7209^2 + 4975^2 .

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 7 ways as a sum of consecutive naturals, for example, 2056 + ... + 12556.

Almost surely, 2^76720306 is an apocalyptic number.

76720306 is a deficient number, since it is larger than the sum of its proper divisors (47665382).

76720306 is a wasteful number, since it uses less digits than its factorization.

76720306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10797.

The product of its (nonzero) digits is 10584, while the sum is 31.

The square root of 76720306 is about 8759.0128439225. The cubic root of 76720306 is about 424.9163498574.

The spelling of 76720306 in words is "seventy-six million, seven hundred twenty thousand, three hundred six".