73255140 has 144 divisors (see below), whose sum is σ = 259564032. Its totient is φ = 16374528.

The previous prime is 73255129. The next prime is 73255177. The reversal of 73255140 is 4155237.

It is a happy number.

73255140 is a `hidden beast` number, since 73 + 2 + 551 + 40 = 666.

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 47 ways as a sum of consecutive naturals, for example, 58602 + ... + 59838.

It is an arithmetic number, because the mean of its divisors is an integer number (1802528).

Almost surely, 2^73255140 is an apocalyptic number.

73255140 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73255140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129782016).

73255140 is an abundant number, since it is smaller than the sum of its proper divisors (186308892).

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

73255140 is a wasteful number, since it uses less digits than its factorization.

73255140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306 (or 1301 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 73255140 is about 8558.9216610505. The cubic root of 73255140 is about 418.4202560427.

The spelling of 73255140 in words is "seventy-three million, two hundred fifty-five thousand, one hundred forty".