72018198 has 48 divisors (see below), whose sum is σ = 186091776. Its totient is φ = 19681200.

The previous prime is 72018197. The next prime is 72018229. The reversal of 72018198 is 89181027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72018197) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9528 + ... + 15323.

It is an arithmetic number, because the mean of its divisors is an integer number (3876912).

Almost surely, 2^72018198 is an apocalyptic number.

72018198 is an abundant number, since it is smaller than the sum of its proper divisors (114073578).

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

72018198 is a wasteful number, since it uses less digits than its factorization.

72018198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24889 (or 24886 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 72018198 is about 8486.3536339231. The cubic root of 72018198 is about 416.0518110703.

The spelling of 72018198 in words is "seventy-two million, eighteen thousand, one hundred ninety-eight".