8000781038 has 4 divisors (see below), whose sum is σ = 12001171560. Its totient is φ = 4000390518.

The previous prime is 8000781031. The next prime is 8000781071. The reversal of 8000781038 is 8301870008.

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

It is a junction number, because it is equal to n+sod(n) for n = 8000780989 and 8000781007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8000781031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000195258 + ... + 2000195261.

It is an arithmetic number, because the mean of its divisors is an integer number (3000292890).

Almost surely, 2^8000781038 is an apocalyptic number.

8000781038 is a deficient number, since it is larger than the sum of its proper divisors (4000390522).

8000781038 is a wasteful number, since it uses less digits than its factorization.

8000781038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4000390521.

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

The square root of 8000781038 is about 89447.0851285831. The cubic root of 8000781038 is about 2000.0650843820.

The spelling of 8000781038 in words is "eight billion, seven hundred eighty-one thousand, thirty-eight".