3215978 has 8 divisors (see below), whose sum is σ = 5077920. Its totient is φ = 1523340.

The previous prime is 3215977. The next prime is 3215983. The reversal of 3215978 is 8795123.

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3215977) 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, 42278 + ... + 42353.

It is an arithmetic number, because the mean of its divisors is an integer number (634740).

Almost surely, 2^3215978 is an apocalyptic number.

3215978 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3215978 is a deficient number, since it is larger than the sum of its proper divisors (1861942).

3215978 is a wasteful number, since it uses less digits than its factorization.

3215978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84652.

The product of its digits is 15120, while the sum is 35.

The square root of 3215978 is about 1793.3148078349. The cubic root of 3215978 is about 147.6061172593.

The spelling of 3215978 in words is "three million, two hundred fifteen thousand, nine hundred seventy-eight".