1909896072 has 128 divisors (see below), whose sum is σ = 5547709440. Its totient is φ = 536682240.

The previous prime is 1909896061. The next prime is 1909896091. The reversal of 1909896072 is 2706989091.

It is a happy number.

1909896072 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3253363 + ... + 3253949.

It is an arithmetic number, because the mean of its divisors is an integer number (43341480).

Almost surely, 2^1909896072 is an apocalyptic number.

1909896072 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 1909896072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2773854720).

1909896072 is an abundant number, since it is smaller than the sum of its proper divisors (3637813368).

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

1909896072 is a wasteful number, since it uses less digits than its factorization.

1909896072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891 (or 887 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 51.

The square root of 1909896072 is about 43702.3577396003. The cubic root of 1909896072 is about 1240.7089407698.

The spelling of 1909896072 in words is "one billion, nine hundred nine million, eight hundred ninety-six thousand, seventy-two".