72826181 has 8 divisors (see below), whose sum is σ = 77266944. Its totient is φ = 68402880.

The previous prime is 72826157. The next prime is 72826207. The reversal of 72826181 is 18162827.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72826181 is a prime.

It is a super-2 number, since 2×72826181² = 10607305278089522, 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 (72826111) 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, 4796 + ... + 12986.

It is an arithmetic number, because the mean of its divisors is an integer number (9658368).

Almost surely, 2^72826181 is an apocalyptic number.

It is an amenable number.

72826181 is a deficient number, since it is larger than the sum of its proper divisors (4440763).

72826181 is a wasteful number, since it uses less digits than its factorization.

72826181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8731.

The product of its digits is 10752, while the sum is 35.

The square root of 72826181 is about 8533.8256954311. The cubic root of 72826181 is about 417.6019443406.

The spelling of 72826181 in words is "seventy-two million, eight hundred twenty-six thousand, one hundred eighty-one".