8007378381 has 6 divisors (see below), whose sum is σ = 11566213230. Its totient is φ = 5338252248.

The previous prime is 8007378371. The next prime is 8007378389. The reversal of 8007378381 is 1838737008.

It can be written as a sum of positive squares in only one way, i.e., 8005775625 + 1602756 = 89475^2 + 1266^2 .

It is not a de Polignac number, because 8007378381 - 2⁵ = 8007378349 is a prime.

It is a super-2 number, since 2×8007378381² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8007378389) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 444854346 + ... + 444854363.

It is an arithmetic number, because the mean of its divisors is an integer number (1927702205).

Almost surely, 2^8007378381 is an apocalyptic number.

It is an amenable number.

8007378381 is a deficient number, since it is larger than the sum of its proper divisors (3558834849).

8007378381 is a wasteful number, since it uses less digits than its factorization.

8007378381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889708715 (or 889708712 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 8007378381 is about 89483.9559977094. The cubic root of 8007378381 is about 2000.6146761506.

The spelling of 8007378381 in words is "eight billion, seven million, three hundred seventy-eight thousand, three hundred eighty-one".