2971656 has 48 divisors (see below), whose sum is σ = 8131500. Its totient is φ = 980352.

The previous prime is 2971607. The next prime is 2971663. The reversal of 2971656 is 6561792.

It can be written as a sum of positive squares in 2 ways, for example, as 2528100 + 443556 = 1590^2 + 666^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2971656.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10590 + ... + 10866.

2^2971656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2971656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4065750).

2971656 is an abundant number, since it is smaller than the sum of its proper divisors (5159844).

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

2971656 is a wasteful number, since it uses less digits than its factorization.

2971656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 431 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 2971656 is about 1723.8491813381. The cubic root of 2971656 is about 143.7693065436.

It can be divided in two parts, 297 and 1656, that added together give a triangular number (1953 = T₆₂).

The spelling of 2971656 in words is "two million, nine hundred seventy-one thousand, six hundred fifty-six".