2179872 has 90 divisors (see below), whose sum is σ = 6639633. Its totient is φ = 701568.

The previous prime is 2179867. The next prime is 2179897. The reversal of 2179872 is 2789712.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 2178576 + 1296 = 1476^2 + 36^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1044.

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

It is a d-powerful number, because it can be written as 2⁸ + 1 + 7⁷ + 9⁶ + 8² + 7⁷ + 2¹⁰ .

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 75154 + ... + 75182.

2^2179872 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 2179872

2179872 is an abundant number, since it is smaller than the sum of its proper divisors (4459761).

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

2179872 is an equidigital number, since it uses as much as digits as its factorization.

2179872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80 (or 34 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 2179872 is about 1476.4389591175. The cubic root of 2179872 is about 129.6612878848.

Multiplying 2179872 by its product of digits (14112), we get a square (30762353664 = 175392²).

The spelling of 2179872 in words is "two million, one hundred seventy-nine thousand, eight hundred seventy-two".