3989823240 has 128 divisors (see below), whose sum is σ = 12913084800. Its totient is φ = 980367360.

The previous prime is 3989823137. The next prime is 3989823263. The reversal of 3989823240 is 423289893.

It is a self number, because there is not a number n which added to its sum of digits gives 3989823240.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1026100 + ... + 1029980.

It is an arithmetic number, because the mean of its divisors is an integer number (100883475).

Almost surely, 2^3989823240 is an apocalyptic number.

3989823240 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 3989823240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6456542400).

3989823240 is an abundant number, since it is smaller than the sum of its proper divisors (8923261560).

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

3989823240 is a wasteful number, since it uses less digits than its factorization.

3989823240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4567 (or 4563 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The square root of 3989823240 is about 63165.0476133755. The cubic root of 3989823240 is about 1586.0536920473.

The spelling of 3989823240 in words is "three billion, nine hundred eighty-nine million, eight hundred twenty-three thousand, two hundred forty".