2173845240 has 192 divisors, whose sum is σ = 8335042560. Its totient is φ = 480833280.

The previous prime is 2173845239. The next prime is 2173845241. The reversal of 2173845240 is 425483712.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2173845239) and next prime (2173845241).

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

It is a junction number, because it is equal to n+sod(n) for n = 2173845195 and 2173845204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173845241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64207 + ... + 92033.

It is an arithmetic number, because the mean of its divisors is an integer number (43411680).

Almost surely, 2^2173845240 is an apocalyptic number.

2173845240 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 2173845240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4167521280).

2173845240 is an abundant number, since it is smaller than the sum of its proper divisors (6161197320).

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

2173845240 is a wasteful number, since it uses less digits than its factorization.

2173845240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27882 (or 27875 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 2173845240 is about 46624.5132950468. The cubic root of 2173845240 is about 1295.4168472670.

The spelling of 2173845240 in words is "two billion, one hundred seventy-three million, eight hundred forty-five thousand, two hundred forty".