3213978 has 8 divisors (see below), whose sum is σ = 6427968. Its totient is φ = 1071324.

The previous prime is 3213961. The next prime is 3213979. The reversal of 3213978 is 8793123.

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

3213978 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3213979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267826 + ... + 267837.

It is an arithmetic number, because the mean of its divisors is an integer number (803496).

Almost surely, 2^3213978 is an apocalyptic number.

3213978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3213978 is a wasteful number, since it uses less digits than its factorization.

3213978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535668.

The product of its digits is 9072, while the sum is 33.

The square root of 3213978 is about 1792.7570945334. The cubic root of 3213978 is about 147.5755124218.

The spelling of 3213978 in words is "three million, two hundred thirteen thousand, nine hundred seventy-eight".