3950820731 has 24 divisors (see below), whose sum is σ = 4736034240. Its totient is φ = 3273304320.

The previous prime is 3950820707. The next prime is 3950820739. The reversal of 3950820731 is 1370280593.

It is a de Polignac number, because none of the positive numbers 2^k-3950820731 is a prime.

It is a super-2 number, since 2×3950820731² = 31217968896998748722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3950820739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108371 + ... + 140163.

It is an arithmetic number, because the mean of its divisors is an integer number (197334760).

Almost surely, 2^3950820731 is an apocalyptic number.

3950820731 is a deficient number, since it is larger than the sum of its proper divisors (785213509).

3950820731 is a wasteful number, since it uses less digits than its factorization.

3950820731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31907 (or 31896 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 3950820731 is about 62855.5544960030. The cubic root of 3950820731 is about 1580.8686046757.

The spelling of 3950820731 in words is "three billion, nine hundred fifty million, eight hundred twenty thousand, seven hundred thirty-one".