3995520120 has 192 divisors, whose sum is σ = 13269765600. Its totient is φ = 1042329600.

The previous prime is 3995520119. The next prime is 3995520121. The reversal of 3995520120 is 210255993.

It is a happy number.

3995520120 is a `hidden beast` number, since 3 + 9 + 9 + 5 + 520 + 120 = 666.

It is an interprime number because it is at equal distance from previous prime (3995520119) and next prime (3995520121).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3995520121) 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, 6647820 + ... + 6648420.

Almost surely, 2^3995520120 is an apocalyptic number.

3995520120 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 3995520120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6634882800).

3995520120 is an abundant number, since it is smaller than the sum of its proper divisors (9274245480).

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

3995520120 is a wasteful number, since it uses less digits than its factorization.

3995520120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990 (or 983 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 3995520120 is about 63210.1267203286. The cubic root of 3995520120 is about 1586.8082167418.

The spelling of 3995520120 in words is "three billion, nine hundred ninety-five million, five hundred twenty thousand, one hundred twenty".