3878173687 has 8 divisors (see below), whose sum is σ = 4019894912. Its totient is φ = 3737491200.

The previous prime is 3878173667. The next prime is 3878173709. The reversal of 3878173687 is 7863718783.

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 3878173687 - 2²³ = 3869785079 is a prime.

It is a super-2 number, since 2×3878173687² = 30080462293078347938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3878173627) 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, 252078 + ... + 267019.

It is an arithmetic number, because the mean of its divisors is an integer number (502486864).

Almost surely, 2^3878173687 is an apocalyptic number.

3878173687 is a deficient number, since it is larger than the sum of its proper divisors (141721225).

3878173687 is a wasteful number, since it uses less digits than its factorization.

3878173687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519369.

The product of its digits is 9483264, while the sum is 58.

The square root of 3878173687 is about 62274.9844399820. The cubic root of 3878173687 is about 1571.1190160184.

The spelling of 3878173687 in words is "three billion, eight hundred seventy-eight million, one hundred seventy-three thousand, six hundred eighty-seven".