3156978 has 32 divisors (see below), whose sum is σ = 7114752. Its totient is φ = 925200.

The previous prime is 3156977. The next prime is 3156991. The reversal of 3156978 is 8796513.

3156978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3156971) 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 15 ways as a sum of consecutive naturals, for example, 1275 + ... + 2817.

It is an arithmetic number, because the mean of its divisors is an integer number (222336).

Almost surely, 2^3156978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3156978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3557376).

3156978 is an abundant number, since it is smaller than the sum of its proper divisors (3957774).

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

3156978 is a wasteful number, since it uses less digits than its factorization.

3156978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590.

The product of its digits is 45360, while the sum is 39.

The square root of 3156978 is about 1776.7886762359. The cubic root of 3156978 is about 146.6978847689.

The spelling of 3156978 in words is "three million, one hundred fifty-six thousand, nine hundred seventy-eight".