3828147981 has 12 divisors (see below), whose sum is σ = 5937535872. Its totient is φ = 2187513048.

The previous prime is 3828147977. The next prime is 3828147989. The reversal of 3828147981 is 1897418283.

3828147981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3828147981 - 2² = 3828147977 is a prime.

It is a super-2 number, since 2×3828147981² = 29309433928868752722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3828147989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13020765 + ... + 13021058.

It is an arithmetic number, because the mean of its divisors is an integer number (494794656).

Almost surely, 2^3828147981 is an apocalyptic number.

It is an amenable number.

3828147981 is a deficient number, since it is larger than the sum of its proper divisors (2109387891).

3828147981 is a wasteful number, since it uses less digits than its factorization.

3828147981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26041840 (or 26041833 counting only the distinct ones).

The product of its digits is 774144, while the sum is 51.

The square root of 3828147981 is about 61872.0290680692. The cubic root of 3828147981 is about 1564.3343167437.

The spelling of 3828147981 in words is "three billion, eight hundred twenty-eight million, one hundred forty-seven thousand, nine hundred eighty-one".