72018196 has 12 divisors (see below), whose sum is σ = 126106848. Its totient is φ = 35987672.

The previous prime is 72018161. The next prime is 72018197. The reversal of 72018196 is 69181027.

It is a happy number.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4035 + ... + 12661.

It is an arithmetic number, because the mean of its divisors is an integer number (10508904).

Almost surely, 2^72018196 is an apocalyptic number.

It is an amenable number.

72018196 is a deficient number, since it is larger than the sum of its proper divisors (54088652).

72018196 is a wasteful number, since it uses less digits than its factorization.

72018196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10718 (or 10716 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 72018196 is about 8486.3535160869. The cubic root of 72018196 is about 416.0518072189.

The spelling of 72018196 in words is "seventy-two million, eighteen thousand, one hundred ninety-six".