4091939840 has 88 divisors (see below), whose sum is σ = 9935155440. Its totient is φ = 1616887808.

The previous prime is 4091939837. The next prime is 4091939861. The reversal of 4091939840 is 489391904.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420146 + ... + 429774.

Almost surely, 2^4091939840 is an apocalyptic number.

4091939840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4091939840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4967577720).

4091939840 is an abundant number, since it is smaller than the sum of its proper divisors (5843215600).

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

4091939840 is an equidigital number, since it uses as much as digits as its factorization.

4091939840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9737 (or 9719 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 4091939840 is about 63968.2721354892. The cubic root of 4091939840 is about 1599.4711585568.

The spelling of 4091939840 in words is "four billion, ninety-one million, nine hundred thirty-nine thousand, eight hundred forty".