173720340 has 36 divisors (see below), whose sum is σ = 526952244. Its totient is φ = 46325376.

The previous prime is 173720329. The next prime is 173720369. The reversal of 173720340 is 43027371.

173720340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 34999056 + 138721284 = 5916^2 + 11778^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 482377 + ... + 482736.

Almost surely, 2^173720340 is an apocalyptic number.

173720340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

173720340 is an abundant number, since it is smaller than the sum of its proper divisors (353231904).

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

173720340 is a wasteful number, since it uses less digits than its factorization.

173720340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965128 (or 965123 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 173720340 is about 13180.3012105187. The cubic root of 173720340 is about 557.9777614755.

The spelling of 173720340 in words is "one hundred seventy-three million, seven hundred twenty thousand, three hundred forty".