3156820 has 12 divisors (see below), whose sum is σ = 6629364. Its totient is φ = 1262720.

The previous prime is 3156817. The next prime is 3156841. The reversal of 3156820 is 286513.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 427716 + 2729104 = 654^2 + 1652^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78901 + ... + 78940.

It is an arithmetic number, because the mean of its divisors is an integer number (552447).

Almost surely, 2^3156820 is an apocalyptic number.

It is an amenable number.

3156820 is an abundant number, since it is smaller than the sum of its proper divisors (3472544).

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

3156820 is a wasteful number, since it uses less digits than its factorization.

3156820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157850 (or 157848 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 3156820 is about 1776.7442134421. The cubic root of 3156820 is about 146.6954374229.

The spelling of 3156820 in words is "three million, one hundred fifty-six thousand, eight hundred twenty".