172736540 has 48 divisors (see below), whose sum is σ = 373947840. Its totient is φ = 66992640.

The previous prime is 172736537. The next prime is 172736549. The reversal of 172736540 is 45637271.

It is a self number, because there is not a number n which added to its sum of digits gives 172736540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172736549) 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 15 ways as a sum of consecutive naturals, for example, 93425 + ... + 95255.

It is an arithmetic number, because the mean of its divisors is an integer number (7790580).

Almost surely, 2^172736540 is an apocalyptic number.

172736540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172736540 is an abundant number, since it is smaller than the sum of its proper divisors (201211300).

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

172736540 is a wasteful number, since it uses less digits than its factorization.

172736540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982 (or 1980 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 172736540 is about 13142.9273755887. The cubic root of 172736540 is about 556.9224676047.

The spelling of 172736540 in words is "one hundred seventy-two million, seven hundred thirty-six thousand, five hundred forty".