173087440 has 20 divisors (see below), whose sum is σ = 402428484. Its totient is φ = 69234944.

The previous prime is 173087423. The next prime is 173087441. The reversal of 173087440 is 44780371.

It can be written as a sum of positive squares in 2 ways, for example, as 40653376 + 132434064 = 6376^2 + 11508^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 173087396 and 173087405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173087441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1081717 + ... + 1081876.

Almost surely, 2^173087440 is an apocalyptic number.

173087440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

173087440 is an abundant number, since it is smaller than the sum of its proper divisors (229341044).

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

173087440 is a wasteful number, since it uses less digits than its factorization.

173087440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163606 (or 2163600 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 173087440 is about 13156.2699881083. The cubic root of 173087440 is about 557.2993265169.

The spelling of 173087440 in words is "one hundred seventy-three million, eighty-seven thousand, four hundred forty".