172873040 has 20 divisors (see below), whose sum is σ = 401930004. Its totient is φ = 69149184.

The previous prime is 172873033. The next prime is 172873069. The reversal of 172873040 is 40378271.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 61528336 + 111344704 = 7844^2 + 10552^2 .

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 = 172872988 and 172873006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1080377 + ... + 1080536.

Almost surely, 2^172873040 is an apocalyptic number.

172873040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172873040 is an abundant number, since it is smaller than the sum of its proper divisors (229056964).

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

172873040 is a wasteful number, since it uses less digits than its factorization.

172873040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160926 (or 2160920 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 172873040 is about 13148.1192571409. The cubic root of 172873040 is about 557.0691262125.

The spelling of 172873040 in words is "one hundred seventy-two million, eight hundred seventy-three thousand, forty".