2174534640 has 160 divisors (see below), whose sum is σ = 7549992960. Its totient is φ = 575237376.

The previous prime is 2174534633. The next prime is 2174534641. The reversal of 2174534640 is 464354712.

2174534640 is a `hidden beast` number, since 2 + 1 + 7 + 4 + 5 + 3 + 4 + 640 = 666.

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 = 2174534595 and 2174534604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2174534641) 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, 270357 + ... + 278283.

It is an arithmetic number, because the mean of its divisors is an integer number (47187456).

Almost surely, 2^2174534640 is an apocalyptic number.

2174534640 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 2174534640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3774996480).

2174534640 is an abundant number, since it is smaller than the sum of its proper divisors (5375458320).

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

2174534640 is a wasteful number, since it uses less digits than its factorization.

2174534640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8076 (or 8064 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 2174534640 is about 46631.9058156537. The cubic root of 2174534640 is about 1295.5537729886.

The spelling of 2174534640 in words is "two billion, one hundred seventy-four million, five hundred thirty-four thousand, six hundred forty".