72140184 has 24 divisors (see below), whose sum is σ = 195379860. Its totient is φ = 24046704.

The previous prime is 72140183. The next prime is 72140203. The reversal of 72140184 is 48104127.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×72140184² = 10408412295107712, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72140183) 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 5 ways as a sum of consecutive naturals, for example, 500902 + ... + 501045.

Almost surely, 2^72140184 is an apocalyptic number.

It is an amenable number.

72140184 is an abundant number, since it is smaller than the sum of its proper divisors (123239676).

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

72140184 is a wasteful number, since it uses less digits than its factorization.

72140184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001959 (or 1001952 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 72140184 is about 8493.5377788057. The cubic root of 72140184 is about 416.2865844532.

The spelling of 72140184 in words is "seventy-two million, one hundred forty thousand, one hundred eighty-four".