3991950740 has 12 divisors (see below), whose sum is σ = 8383096596. Its totient is φ = 1596780288.

The previous prime is 3991950737. The next prime is 3991950811. The reversal of 3991950740 is 470591993.

It can be written as a sum of positive squares in 2 ways, for example, as 1797590404 + 2194360336 = 42398^2 + 46844^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 99798749 + ... + 99798788.

It is an arithmetic number, because the mean of its divisors is an integer number (698591383).

Almost surely, 2^3991950740 is an apocalyptic number.

It is an amenable number.

3991950740 is an abundant number, since it is smaller than the sum of its proper divisors (4391145856).

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

3991950740 is a wasteful number, since it uses less digits than its factorization.

3991950740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199597546 (or 199597544 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 3991950740 is about 63181.8861700092. The cubic root of 3991950740 is about 1586.3355532927.

The spelling of 3991950740 in words is "three billion, nine hundred ninety-one million, nine hundred fifty thousand, seven hundred forty".