3995389440 has 360 divisors, whose sum is σ = 16100833320. Its totient is φ = 912973824.

The previous prime is 3995389429. The next prime is 3995389507. The reversal of 3995389440 is 449835993.

3995389440 is a `hidden beast` number, since 39 + 95 + 3 + 89 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1127191 + ... + 1130729.

It is an arithmetic number, because the mean of its divisors is an integer number (44724537).

Almost surely, 2^3995389440 is an apocalyptic number.

3995389440 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 3995389440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8050416660).

3995389440 is an abundant number, since it is smaller than the sum of its proper divisors (12105443880).

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

3995389440 is a wasteful number, since it uses less digits than its factorization.

3995389440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3582 (or 3556 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The square root of 3995389440 is about 63209.0930167488. The cubic root of 3995389440 is about 1586.7909168366.

The spelling of 3995389440 in words is "three billion, nine hundred ninety-five million, three hundred eighty-nine thousand, four hundred forty".