8138033920 has 36 divisors (see below), whose sum is σ = 19493137440. Its totient is φ = 3255213056.

The previous prime is 8138033899. The next prime is 8138033923. The reversal of 8138033920 is 293308318.

It is a self number, because there is not a number n which added to its sum of digits gives 8138033920.

It is not an unprimeable number, because it can be changed into a prime (8138033923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3177640 + ... + 3180199.

It is an arithmetic number, because the mean of its divisors is an integer number (541476040).

Almost surely, 2^8138033920 is an apocalyptic number.

8138033920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8138033920 is an abundant number, since it is smaller than the sum of its proper divisors (11355103520).

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

8138033920 is an equidigital number, since it uses as much as digits as its factorization.

8138033920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6357860 (or 6357846 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 8138033920 is about 90211.0520945189. The cubic root of 8138033920 is about 2011.4372961177.

The spelling of 8138033920 in words is "eight billion, one hundred thirty-eight million, thirty-three thousand, nine hundred twenty".