3991127434 has 32 divisors (see below), whose sum is σ = 7256407680. Its totient is φ = 1607198208.

The previous prime is 3991127419. The next prime is 3991127453. The reversal of 3991127434 is 4347211993.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133257 + ... + 160435.

It is an arithmetic number, because the mean of its divisors is an integer number (226762740).

Almost surely, 2^3991127434 is an apocalyptic number.

3991127434 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

3991127434 is a deficient number, since it is larger than the sum of its proper divisors (3265280246).

3991127434 is a wasteful number, since it uses less digits than its factorization.

3991127434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27822.

The product of its digits is 163296, while the sum is 43.

The square root of 3991127434 is about 63175.3704698279. The cubic root of 3991127434 is about 1586.2264897077.

The spelling of 3991127434 in words is "three billion, nine hundred ninety-one million, one hundred twenty-seven thousand, four hundred thirty-four".