3857521872 has 40 divisors (see below), whose sum is σ = 9993538944. Its totient is φ = 1282192384.

The previous prime is 3857521849. The next prime is 3857521879. The reversal of 3857521872 is 2781257583.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3857521879) 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, 96888 + ... + 130775.

Almost surely, 2^3857521872 is an apocalyptic number.

It is an amenable number.

3857521872 is an abundant number, since it is smaller than the sum of its proper divisors (6136017072).

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

3857521872 is a wasteful number, since it uses less digits than its factorization.

3857521872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228027 (or 228021 counting only the distinct ones).

The product of its digits is 940800, while the sum is 48.

The square root of 3857521872 is about 62108.9516253495. The cubic root of 3857521872 is about 1568.3252418651.

It can be divided in two parts, 385 and 7521872, that added together give a palindrome (7522257).

The spelling of 3857521872 in words is "three billion, eight hundred fifty-seven million, five hundred twenty-one thousand, eight hundred seventy-two".