2172744 has 80 divisors (see below), whose sum is σ = 6969600. Its totient is φ = 619488.

The previous prime is 2172733. The next prime is 2172761. The reversal of 2172744 is 4472712.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4297 + ... + 4775.

It is an arithmetic number, because the mean of its divisors is an integer number (87120).

2^2172744 is an apocalyptic number.

2172744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2172744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3484800).

2172744 is an abundant number, since it is smaller than the sum of its proper divisors (4796856).

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

2172744 is a wasteful number, since it uses less digits than its factorization.

2172744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504 (or 491 counting only the distinct ones).

The product of its digits is 3136, while the sum is 27.

The square root of 2172744 is about 1474.0230663053. The cubic root of 2172744 is about 129.5198063552.

Subtracting 2172744 from its reverse (4472712), we obtain a cube (2299968 = 132³).

It can be divided in two parts, 2172 and 744, that added together give a square (2916 = 54²).

The spelling of 2172744 in words is "two million, one hundred seventy-two thousand, seven hundred forty-four".