72191598 has 16 divisors (see below), whose sum is σ = 146361936. Its totient is φ = 23734080.

The previous prime is 72191597. The next prime is 72191627. The reversal of 72191598 is 89519127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72191597) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81973 + ... + 82848.

It is an arithmetic number, because the mean of its divisors is an integer number (9147621).

Almost surely, 2^72191598 is an apocalyptic number.

72191598 is an abundant number, since it is smaller than the sum of its proper divisors (74170338).

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

72191598 is a wasteful number, since it uses less digits than its factorization.

72191598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164899.

The product of its digits is 45360, while the sum is 42.

The square root of 72191598 is about 8496.5638937161. The cubic root of 72191598 is about 416.3854561901.

The spelling of 72191598 in words is "seventy-two million, one hundred ninety-one thousand, five hundred ninety-eight".