67990306 has 8 divisors (see below), whose sum is σ = 102031020. Its totient is φ = 33979968.

The previous prime is 67990249. The next prime is 67990309. The reversal of 67990306 is 60309976.

It can be written as a sum of positive squares in 2 ways, for example, as 53890281 + 14100025 = 7341^2 + 3755^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (67990309) by changing a digit.

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, 771 + ... + 11686.

Almost surely, 2^67990306 is an apocalyptic number.

67990306 is a deficient number, since it is larger than the sum of its proper divisors (34040714).

67990306 is a wasteful number, since it uses less digits than its factorization.

67990306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15188.

The product of its (nonzero) digits is 61236, while the sum is 40.

The square root of 67990306 is about 8245.6234451981. The cubic root of 67990306 is about 408.1461134050.

The spelling of 67990306 in words is "sixty-seven million, nine hundred ninety thousand, three hundred six".