3990711730 has 16 divisors (see below), whose sum is σ = 7192422720. Its totient is φ = 1594253232.

The previous prime is 3990711667. The next prime is 3990711731. The reversal of 3990711730 is 371170993.

It is a happy number.

It is a super-2 number, since 2×3990711730² = 31851560223919185800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3990711731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245670 + ... + 261409.

It is an arithmetic number, because the mean of its divisors is an integer number (449526420).

Almost surely, 2^3990711730 is an apocalyptic number.

3990711730 is a deficient number, since it is larger than the sum of its proper divisors (3201710990).

3990711730 is a wasteful number, since it uses less digits than its factorization.

3990711730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507873.

The product of its (nonzero) digits is 35721, while the sum is 40.

The square root of 3990711730 is about 63172.0803045143. The cubic root of 3990711730 is about 1586.1714155795.

The spelling of 3990711730 in words is "three billion, nine hundred ninety million, seven hundred eleven thousand, seven hundred thirty".