3931729252 has 24 divisors (see below), whose sum is σ = 7680591072. Its totient is φ = 1745587200.

The previous prime is 3931729229. The next prime is 3931729267. The reversal of 3931729252 is 2529271393.

It is a super-2 number, since 2×3931729252² = 30916989822064959008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a junction number, because it is equal to n+sod(n) for n = 3931729199 and 3931729208.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1037149 + ... + 1040932.

It is an arithmetic number, because the mean of its divisors is an integer number (320024628).

Almost surely, 2^3931729252 is an apocalyptic number.

It is an amenable number.

3931729252 is a deficient number, since it is larger than the sum of its proper divisors (3748861820).

3931729252 is a wasteful number, since it uses less digits than its factorization.

3931729252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2078139 (or 2078137 counting only the distinct ones).

The product of its digits is 204120, while the sum is 43.

The square root of 3931729252 is about 62703.5027091789. The cubic root of 3931729252 is about 1578.3180911397.

The spelling of 3931729252 in words is "three billion, nine hundred thirty-one million, seven hundred twenty-nine thousand, two hundred fifty-two".