72161884 has 6 divisors (see below), whose sum is σ = 126283304. Its totient is φ = 36080940.

The previous prime is 72161849. The next prime is 72161891. The reversal of 72161884 is 48816127.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9020232 + ... + 9020239.

Almost surely, 2^72161884 is an apocalyptic number.

It is an amenable number.

72161884 is a deficient number, since it is larger than the sum of its proper divisors (54121420).

72161884 is a wasteful number, since it uses less digits than its factorization.

72161884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18040475 (or 18040473 counting only the distinct ones).

The product of its digits is 21504, while the sum is 37.

The square root of 72161884 is about 8494.8151245333. The cubic root of 72161884 is about 416.3283203844.

The spelling of 72161884 in words is "seventy-two million, one hundred sixty-one thousand, eight hundred eighty-four".