72768181 has 8 divisors (see below), whose sum is σ = 75218400. Its totient is φ = 70358640.

The previous prime is 72768133. The next prime is 72768193. The reversal of 72768181 is 18186727.

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

It is a cyclic number.

It is not a de Polignac number, because 72768181 - 2¹³ = 72759989 is a prime.

It is a super-2 number, since 2×72768181² = 10590416332097522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72769181) 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, 6511 + ... + 13708.

It is an arithmetic number, because the mean of its divisors is an integer number (9402300).

Almost surely, 2^72768181 is an apocalyptic number.

It is an amenable number.

72768181 is a deficient number, since it is larger than the sum of its proper divisors (2450219).

72768181 is a wasteful number, since it uses less digits than its factorization.

72768181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20339.

The product of its digits is 37632, while the sum is 40.

The square root of 72768181 is about 8530.4267771314. The cubic root of 72768181 is about 417.4910531507.

The spelling of 72768181 in words is "seventy-two million, seven hundred sixty-eight thousand, one hundred eighty-one".