2172477940 has 96 divisors (see below), whose sum is σ = 5046935040. Its totient is φ = 782014464.

The previous prime is 2172477893. The next prime is 2172477941. The reversal of 2172477940 is 497742712.

2172477940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172477941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 740757 + ... + 743683.

It is an arithmetic number, because the mean of its divisors is an integer number (52572240).

Almost surely, 2^2172477940 is an apocalyptic number.

2172477940 is a gapful number since it is divisible by the number (20) 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 2172477940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2523467520).

2172477940 is an abundant number, since it is smaller than the sum of its proper divisors (2874457100).

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

2172477940 is a wasteful number, since it uses less digits than its factorization.

2172477940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3049 (or 3047 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 43.

The square root of 2172477940 is about 46609.8481010183. The cubic root of 2172477940 is about 1295.1451942370.

The spelling of 2172477940 in words is "two billion, one hundred seventy-two million, four hundred seventy-seven thousand, nine hundred forty".