2788117387 has 8 divisors (see below), whose sum is σ = 3051966960. Its totient is φ = 2525998560.

The previous prime is 2788117373. The next prime is 2788117421. The reversal of 2788117387 is 7837118872.

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 2788117387 - 2⁷ = 2788117259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2788117307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429312 + ... + 435757.

It is an arithmetic number, because the mean of its divisors is an integer number (381495870).

Almost surely, 2^2788117387 is an apocalyptic number.

2788117387 is a deficient number, since it is larger than the sum of its proper divisors (263849573).

2788117387 is a wasteful number, since it uses less digits than its factorization.

2788117387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865373.

The product of its digits is 1053696, while the sum is 52.

The square root of 2788117387 is about 52802.6267054964. The cubic root of 2788117387 is about 1407.4631020701.

The spelling of 2788117387 in words is "two billion, seven hundred eighty-eight million, one hundred seventeen thousand, three hundred eighty-seven".