3840857172 has 18 divisors (see below), whose sum is σ = 9708833498. Its totient is φ = 1280285712.

The previous prime is 3840857171. The next prime is 3840857173. The reversal of 3840857172 is 2717580483.

3840857172 is a `hidden beast` number, since 3 + 8 + 4 + 0 + 8 + 571 + 72 = 666.

It is an interprime number because it is at equal distance from previous prime (3840857171) and next prime (3840857173).

It can be written as a sum of positive squares in only one way, i.e., 3149903376 + 690953796 = 56124^2 + 26286^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3840857171) 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 5 ways as a sum of consecutive naturals, for example, 53345203 + ... + 53345274.

Almost surely, 2^3840857172 is an apocalyptic number.

It is an amenable number.

3840857172 is an abundant number, since it is smaller than the sum of its proper divisors (5867976326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3840857172 is a wasteful number, since it uses less digits than its factorization.

3840857172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106690487 (or 106690482 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 3840857172 is about 61974.6494302307. The cubic root of 3840857172 is about 1566.0635656782.

The spelling of 3840857172 in words is "three billion, eight hundred forty million, eight hundred fifty-seven thousand, one hundred seventy-two".