8440073881 has 8 divisors (see below), whose sum is σ = 8618162184. Its totient is φ = 8262683520.

The previous prime is 8440073849. The next prime is 8440073903. The reversal of 8440073881 is 1883700448.

It can be written as a sum of positive squares in 4 ways, for example, as 6509262400 + 1930811481 = 80680^2 + 43941^2 .

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 8440073881 - 2⁵ = 8440073849 is a prime.

It is a super-2 number, since 2×8440073881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8440073801) 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, 150010 + ... + 198451.

It is an arithmetic number, because the mean of its divisors is an integer number (1077270273).

Almost surely, 2^8440073881 is an apocalyptic number.

It is an amenable number.

8440073881 is a deficient number, since it is larger than the sum of its proper divisors (178088303).

8440073881 is a wasteful number, since it uses less digits than its factorization.

8440073881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348971.

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 8440073881 is about 91869.8747196272. The cubic root of 8440073881 is about 2036.0202014128.

The spelling of 8440073881 in words is "eight billion, four hundred forty million, seventy-three thousand, eight hundred eighty-one".