3856641274 has 8 divisors (see below), whose sum is σ = 5785229268. Its totient is φ = 1928231520.

The previous prime is 3856641263. The next prime is 3856641277. The reversal of 3856641274 is 4721466583.

It can be written as a sum of positive squares in 2 ways, for example, as 3606843249 + 249798025 = 60057^2 + 15805^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (3856641277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47934 + ... + 100054.

Almost surely, 2^3856641274 is an apocalyptic number.

3856641274 is a deficient number, since it is larger than the sum of its proper divisors (1928587994).

3856641274 is a wasteful number, since it uses less digits than its factorization.

3856641274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89120.

The product of its digits is 967680, while the sum is 46.

The square root of 3856641274 is about 62101.8620815834. The cubic root of 3856641274 is about 1568.2058932936.

The spelling of 3856641274 in words is "three billion, eight hundred fifty-six million, six hundred forty-one thousand, two hundred seventy-four".