3995187840 has 256 divisors, whose sum is σ = 16171488000. Its totient is φ = 913158144.

The previous prime is 3995187803. The next prime is 3995187851. The reversal of 3995187840 is 487815993.

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

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, 104446 + ... + 137474.

It is an arithmetic number, because the mean of its divisors is an integer number (63169875).

Almost surely, 2^3995187840 is an apocalyptic number.

3995187840 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 3995187840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8085744000).

3995187840 is an abundant number, since it is smaller than the sum of its proper divisors (12176300160).

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

3995187840 is a wasteful number, since it uses less digits than its factorization.

3995187840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33064 (or 33046 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The square root of 3995187840 is about 63207.4982893644. The cubic root of 3995187840 is about 1586.7642275376.

The spelling of 3995187840 in words is "three billion, nine hundred ninety-five million, one hundred eighty-seven thousand, eight hundred forty".