2971644 has 48 divisors (see below), whose sum is σ = 7658112. Its totient is φ = 891072.

The previous prime is 2971607. The next prime is 2971663. The reversal of 2971644 is 4461792.

It is a happy number.

Its product of digits (12096) is a multiple of the sum of its prime divisors (504).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6487 + ... + 6929.

It is an arithmetic number, because the mean of its divisors is an integer number (159544).

2^2971644 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 2971644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3829056).

2971644 is an abundant number, since it is smaller than the sum of its proper divisors (4686468).

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

2971644 is a wasteful number, since it uses less digits than its factorization.

2971644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506 (or 504 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 2971644 is about 1723.8457007517. The cubic root of 2971644 is about 143.7691130226.

The spelling of 2971644 in words is "two million, nine hundred seventy-one thousand, six hundred forty-four".