72161798 has 8 divisors (see below), whose sum is σ = 108613008. Its totient is φ = 35957464.

The previous prime is 72161797. The next prime is 72161801. The reversal of 72161798 is 89716127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72161797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60986 + ... + 62157.

It is an arithmetic number, because the mean of its divisors is an integer number (13576626).

Almost surely, 2^72161798 is an apocalyptic number.

72161798 is a deficient number, since it is larger than the sum of its proper divisors (36451210).

72161798 is a wasteful number, since it uses less digits than its factorization.

72161798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123438.

The product of its digits is 42336, while the sum is 41.

The square root of 72161798 is about 8494.8100626206. The cubic root of 72161798 is about 416.3281549959.

The spelling of 72161798 in words is "seventy-two million, one hundred sixty-one thousand, seven hundred ninety-eight".