1913889792 has 88 divisors (see below), whose sum is σ = 5114159296. Its totient is φ = 636346368.

The previous prime is 1913889781. The next prime is 1913889793. The reversal of 1913889792 is 2979883191.

It is not an unprimeable number, because it can be changed into a prime (1913889793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2325093 + ... + 2325915.

Almost surely, 2^1913889792 is an apocalyptic number.

1913889792 is a gapful number since it is divisible by the number (12) 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 1913889792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2557079648).

1913889792 is an abundant number, since it is smaller than the sum of its proper divisors (3200269504).

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

1913889792 is an equidigital number, since it uses as much as digits as its factorization.

1913889792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603 (or 1585 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 57.

The square root of 1913889792 is about 43748.0261497590. The cubic root of 1913889792 is about 1241.5731403833.

The spelling of 1913889792 in words is "one billion, nine hundred thirteen million, eight hundred eighty-nine thousand, seven hundred ninety-two".