3995887770 has 144 divisors (see below), whose sum is σ = 12111170760. Its totient is φ = 911409408.

The previous prime is 3995887769. The next prime is 3995887771. The reversal of 3995887770 is 777885993.

3995887770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3995887769) and next prime (3995887771).

It can be written as a sum of positive squares in 4 ways, for example, as 3961065969 + 34821801 = 62937^2 + 5901^2 .

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 3995887698 and 3995887707.

It is not an unprimeable number, because it can be changed into a prime (3995887771) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3655344 + ... + 3656436.

Almost surely, 2^3995887770 is an apocalyptic number.

3995887770 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3995887770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6055585380).

3995887770 is an abundant number, since it is smaller than the sum of its proper divisors (8115282990).

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

3995887770 is a wasteful number, since it uses less digits than its factorization.

3995887770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949 (or 1939 counting only the distinct ones).

The product of its (nonzero) digits is 26671680, while the sum is 63.

The square root of 3995887770 is about 63213.0348108679. The cubic root of 3995887770 is about 1586.8568855951.

The spelling of 3995887770 in words is "three billion, nine hundred ninety-five million, eight hundred eighty-seven thousand, seven hundred seventy".