2471644 has 24 divisors (see below), whose sum is σ = 5066208. Its totient is φ = 1032960.

The previous prime is 2471639. The next prime is 2471663. The reversal of 2471644 is 4461742.

It is a super-2 number, since 2×2471644² = 12218048125472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a plaindrome in base 8.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72 + ... + 2224.

It is an arithmetic number, because the mean of its divisors is an integer number (211092).

2^2471644 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 2471644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2533104).

2471644 is an abundant number, since it is smaller than the sum of its proper divisors (2594564).

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

2471644 is a wasteful number, since it uses less digits than its factorization.

2471644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2205 (or 2203 counting only the distinct ones).

The product of its digits is 5376, while the sum is 28.

The square root of 2471644 is about 1572.1463036244. The cubic root of 2471644 is about 135.2057949502.

It can be divided in two parts, 247 and 1644, that added together give a triangular number (1891 = T₆₁).

The spelling of 2471644 in words is "two million, four hundred seventy-one thousand, six hundred forty-four".