8138940277 has 8 divisors (see below), whose sum is σ = 9067254840. Its totient is φ = 7253803200.

The previous prime is 8138940259. The next prime is 8138940343. The reversal of 8138940277 is 7720498318.

It can be written as a sum of positive squares in 4 ways, for example, as 11737476 + 8127202801 = 3426^2 + 90151^2 .

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 8138940277 - 2¹⁵ = 8138907509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8138940277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8138940877) 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, 10793974 + ... + 10794727.

It is an arithmetic number, because the mean of its divisors is an integer number (1133406855).

Almost surely, 2^8138940277 is an apocalyptic number.

It is an amenable number.

8138940277 is a deficient number, since it is larger than the sum of its proper divisors (928314563).

8138940277 is a wasteful number, since it uses less digits than its factorization.

8138940277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21588743.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 8138940277 is about 90216.0754910121. The cubic root of 8138940277 is about 2011.5119665936.

The spelling of 8138940277 in words is "eight billion, one hundred thirty-eight million, nine hundred forty thousand, two hundred seventy-seven".