72161084 has 24 divisors (see below), whose sum is σ = 128534448. Its totient is φ = 35441280.

The previous prime is 72161083. The next prime is 72161093. The reversal of 72161084 is 48016127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72161083) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 122639 + ... + 123225.

It is an arithmetic number, because the mean of its divisors is an integer number (5355602).

Almost surely, 2^72161084 is an apocalyptic number.

It is an amenable number.

72161084 is a deficient number, since it is larger than the sum of its proper divisors (56373364).

72161084 is a wasteful number, since it uses less digits than its factorization.

72161084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085 (or 1083 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 72161084 is about 8494.7680368566. The cubic root of 72161084 is about 416.3267818812.

The spelling of 72161084 in words is "seventy-two million, one hundred sixty-one thousand, eighty-four".