8408038181 has 4 divisors (see below), whose sum is σ = 8426436972. Its totient is φ = 8389639392.

The previous prime is 8408038157. The next prime is 8408038189. The reversal of 8408038181 is 1818308048.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7333181956 + 1074856225 = 85634^2 + 32785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8408038181 is a prime.

It is a super-2 number, since 2×8408038181² (a number of 21 digits) 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 (8408038189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9198710 + ... + 9199623.

It is an arithmetic number, because the mean of its divisors is an integer number (2106609243).

Almost surely, 2^8408038181 is an apocalyptic number.

It is an amenable number.

8408038181 is a deficient number, since it is larger than the sum of its proper divisors (18398791).

8408038181 is a wasteful number, since it uses less digits than its factorization.

8408038181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18398790.

The product of its (nonzero) digits is 49152, while the sum is 41.

The square root of 8408038181 is about 91695.3552858595. The cubic root of 8408038181 is about 2033.4409178556.

The spelling of 8408038181 in words is "eight billion, four hundred eight million, thirty-eight thousand, one hundred eighty-one".