2172890424 has 64 divisors (see below), whose sum is σ = 5633712000. Its totient is φ = 697558400.

The previous prime is 2172890413. The next prime is 2172890437. The reversal of 2172890424 is 4240982712.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 287899 + ... + 295349.

It is an arithmetic number, because the mean of its divisors is an integer number (88026750).

Almost surely, 2^2172890424 is an apocalyptic number.

2172890424 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 2172890424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2816856000).

2172890424 is an abundant number, since it is smaller than the sum of its proper divisors (3460821576).

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

2172890424 is a wasteful number, since it uses less digits than its factorization.

2172890424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7908 (or 7904 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 2172890424 is about 46614.2727498778. The cubic root of 2172890424 is about 1295.2271579174.

The spelling of 2172890424 in words is "two billion, one hundred seventy-two million, eight hundred ninety thousand, four hundred twenty-four".