3823828991 has 4 divisors (see below), whose sum is σ = 3823974000. Its totient is φ = 3823683984.

The previous prime is 3823828969. The next prime is 3823829033. The reversal of 3823828991 is 1998283283.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3823828991 - 2⁶ = 3823828927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3823828391) 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, 20531 + ... + 89828.

It is an arithmetic number, because the mean of its divisors is an integer number (955993500).

Almost surely, 2^3823828991 is an apocalyptic number.

3823828991 is a deficient number, since it is larger than the sum of its proper divisors (145009).

3823828991 is a wasteful number, since it uses less digits than its factorization.

3823828991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145008.

The product of its digits is 1492992, while the sum is 53.

The square root of 3823828991 is about 61837.1166129211. The cubic root of 3823828991 is about 1563.7457913630.

The spelling of 3823828991 in words is "three billion, eight hundred twenty-three million, eight hundred twenty-eight thousand, nine hundred ninety-one".