3995724081 has 32 divisors (see below), whose sum is σ = 5851992960. Its totient is φ = 2413845504.

The previous prime is 3995724077. The next prime is 3995724097. The reversal of 3995724081 is 1804275993.

It is not a de Polignac number, because 3995724081 - 2² = 3995724077 is a prime.

It is a super-2 number, since 2×3995724081² = 31931621862966589122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3995724081.

It is not an unprimeable number, because it can be changed into a prime (3995724041) 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 31 ways as a sum of consecutive naturals, for example, 548046 + ... + 555288.

It is an arithmetic number, because the mean of its divisors is an integer number (182874780).

Almost surely, 2^3995724081 is an apocalyptic number.

It is an amenable number.

3995724081 is a deficient number, since it is larger than the sum of its proper divisors (1856268879).

3995724081 is a wasteful number, since it uses less digits than its factorization.

3995724081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7665.

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 3995724081 is about 63211.7400567331. The cubic root of 3995724081 is about 1586.8352171050.

The spelling of 3995724081 in words is "three billion, nine hundred ninety-five million, seven hundred twenty-four thousand, eighty-one".