3899824380 has 144 divisors (see below), whose sum is σ = 12328977024. Its totient is φ = 1034752320.

The previous prime is 3899824373. The next prime is 3899824381. The reversal of 3899824380 is 834289983.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3899824381) 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 47 ways as a sum of consecutive naturals, for example, 1023559 + ... + 1027361.

It is an arithmetic number, because the mean of its divisors is an integer number (85617896).

Almost surely, 2^3899824380 is an apocalyptic number.

3899824380 is a gapful number since it is divisible by the number (30) 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 3899824380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6164488512).

3899824380 is an abundant number, since it is smaller than the sum of its proper divisors (8429152644).

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

3899824380 is a wasteful number, since it uses less digits than its factorization.

3899824380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4038 (or 4024 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The square root of 3899824380 is about 62448.5738828358. The cubic root of 3899824380 is about 1574.0372892188.

The spelling of 3899824380 in words is "three billion, eight hundred ninety-nine million, eight hundred twenty-four thousand, three hundred eighty".