2978306 has 4 divisors (see below), whose sum is σ = 4467462. Its totient is φ = 1489152.

The previous prime is 2978303. The next prime is 2978317. The reversal of 2978306 is 6038792.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2544025 + 434281 = 1595^2 + 659^2 .

It is not an unprimeable number, because it can be changed into a prime (2978303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 744575 + ... + 744578.

2^2978306 is an apocalyptic number.

2978306 is a deficient number, since it is larger than the sum of its proper divisors (1489156).

2978306 is a wasteful number, since it uses less digits than its factorization.

2978306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489155.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 2978306 is about 1725.7769264885. The cubic root of 2978306 is about 143.8764694195.

The spelling of 2978306 in words is "two million, nine hundred seventy-eight thousand, three hundred six".