7381281338 has 4 divisors (see below), whose sum is σ = 11071922010. Its totient is φ = 3690640668.

The previous prime is 7381281311. The next prime is 7381281361. The reversal of 7381281338 is 8331821837.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8331821837 = 2833 ⋅2940989.

It can be written as a sum of positive squares in only one way, i.e., 4405906129 + 2975375209 = 66377^2 + 54547^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1845320333 + ... + 1845320336.

Almost surely, 2^7381281338 is an apocalyptic number.

7381281338 is a deficient number, since it is larger than the sum of its proper divisors (3690640672).

7381281338 is a wasteful number, since it uses less digits than its factorization.

7381281338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3690640671.

The product of its digits is 193536, while the sum is 44.

The square root of 7381281338 is about 85914.3837666313. The cubic root of 7381281338 is about 1947.0506664062.

The spelling of 7381281338 in words is "seven billion, three hundred eighty-one million, two hundred eighty-one thousand, three hundred thirty-eight".