3857172984 has 144 divisors (see below), whose sum is σ = 12351966120. Its totient is φ = 1083922560.

The previous prime is 3857172953. The next prime is 3857173037. The reversal of 3857172984 is 4892717583.

It is a happy number.

3857172984 is a `hidden beast` number, since 385 + 7 + 172 + 98 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 3857172984.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 206247 + ... + 224169.

Almost surely, 2^3857172984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3857172984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6175983060).

3857172984 is an abundant number, since it is smaller than the sum of its proper divisors (8494793136).

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

3857172984 is a wasteful number, since it uses less digits than its factorization.

3857172984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18010 (or 17996 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The square root of 3857172984 is about 62106.1428845811. The cubic root of 3857172984 is about 1568.2779588017.

The spelling of 3857172984 in words is "three billion, eight hundred fifty-seven million, one hundred seventy-two thousand, nine hundred eighty-four".