3791821896 has 80 divisors (see below), whose sum is σ = 10630709100. Its totient is φ = 1262739456.

The previous prime is 3791821879. The next prime is 3791821907. The reversal of 3791821896 is 6981281973.

3791821896 is a `hidden beast` number, since 379 + 182 + 1 + 8 + 96 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2314956996 + 1476864900 = 48114^2 + 38430^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 910956 + ... + 915108.

Almost surely, 2^3791821896 is an apocalyptic number.

3791821896 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3791821896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5315354550).

3791821896 is an abundant number, since it is smaller than the sum of its proper divisors (6838887204).

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

3791821896 is a wasteful number, since it uses less digits than its factorization.

3791821896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5580 (or 5567 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 3791821896 is about 61577.7711191303. The cubic root of 3791821896 is about 1559.3704856482.

The spelling of 3791821896 in words is "three billion, seven hundred ninety-one million, eight hundred twenty-one thousand, eight hundred ninety-six".