2978312 has 8 divisors (see below), whose sum is σ = 5584350. Its totient is φ = 1489152.

The previous prime is 2978303. The next prime is 2978317. The reversal of 2978312 is 2138792.

It can be written as a sum of positive squares in only one way, i.e., 2328676 + 649636 = 1526^2 + 806^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (2978317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186137 + ... + 186152.

2^2978312 is an apocalyptic number.

It is an amenable number.

2978312 is a deficient number, since it is larger than the sum of its proper divisors (2606038).

2978312 is a wasteful number, since it uses less digits than its factorization.

2978312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372295 (or 372291 counting only the distinct ones).

The product of its digits is 6048, while the sum is 32.

The square root of 2978312 is about 1725.7786648351. The cubic root of 2978312 is about 143.8765660358.

The spelling of 2978312 in words is "two million, nine hundred seventy-eight thousand, three hundred twelve".