2175398640 has 80 divisors (see below), whose sum is σ = 7493047200. Its totient is φ = 580105728.

The previous prime is 2175398639. The next prime is 2175398657. The reversal of 2175398640 is 468935712.

2175398640 is a `hidden beast` number, since 217 + 5 + 398 + 6 + 40 = 666.

2175398640 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (45).

2175398640 is strictly pandigital in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 501405 + ... + 505724.

It is an arithmetic number, because the mean of its divisors is an integer number (93663090).

It is a 1-persistent number, because it is pandigital, but 2⋅2175398640 = 4350797280 is not.

Almost surely, 2^2175398640 is an apocalyptic number.

2175398640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2175398640 is an abundant number, since it is smaller than the sum of its proper divisors (5317648560).

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

2175398640 is a wasteful number, since it uses less digits than its factorization.

2175398640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007151 (or 1007139 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 2175398640 is about 46641.1689390393. The cubic root of 2175398640 is about 1295.7253361699.

The spelling of 2175398640 in words is "two billion, one hundred seventy-five million, three hundred ninety-eight thousand, six hundred forty".