3991203426 has 16 divisors (see below), whose sum is σ = 9122750784. Its totient is φ = 1140343824.

The previous prime is 3991203371. The next prime is 3991203457. The reversal of 3991203426 is 6243021993.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47514285 + ... + 47514368.

It is an arithmetic number, because the mean of its divisors is an integer number (570171924).

Almost surely, 2^3991203426 is an apocalyptic number.

3991203426 is an abundant number, since it is smaller than the sum of its proper divisors (5131547358).

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

3991203426 is a wasteful number, since it uses less digits than its factorization.

3991203426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95028665.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 3991203426 is about 63175.9719038813. The cubic root of 3991203426 is about 1586.2365570183.

The spelling of 3991203426 in words is "three billion, nine hundred ninety-one million, two hundred three thousand, four hundred twenty-six".