2172785448 has 32 divisors (see below), whose sum is σ = 5524034400. Its totient is φ = 711985728.

The previous prime is 2172785441. The next prime is 2172785449. The reversal of 2172785448 is 8445872712.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2172785397 and 2172785406.

It is not an unprimeable number, because it can be changed into a prime (2172785441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 765811 + ... + 768642.

It is an arithmetic number, because the mean of its divisors is an integer number (172626075).

Almost surely, 2^2172785448 is an apocalyptic number.

It is an amenable number.

2172785448 is an abundant number, since it is smaller than the sum of its proper divisors (3351248952).

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

2172785448 is a wasteful number, since it uses less digits than its factorization.

2172785448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534521 (or 1534517 counting only the distinct ones).

The product of its digits is 1003520, while the sum is 48.

The square root of 2172785448 is about 46613.1467292222. The cubic root of 2172785448 is about 1295.2062993789.

The spelling of 2172785448 in words is "two billion, one hundred seventy-two million, seven hundred eighty-five thousand, four hundred forty-eight".