1897134792 has 64 divisors (see below), whose sum is σ = 5433523200. Its totient is φ = 540724800.

The previous prime is 1897134791. The next prime is 1897134809. The reversal of 1897134792 is 2974317981.

It is not an unprimeable number, because it can be changed into a prime (1897134791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56917 + ... + 83867.

It is an arithmetic number, because the mean of its divisors is an integer number (84898800).

Almost surely, 2^1897134792 is an apocalyptic number.

1897134792 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 1897134792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2716761600).

1897134792 is an abundant number, since it is smaller than the sum of its proper divisors (3536388408).

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

1897134792 is a wasteful number, since it uses less digits than its factorization.

1897134792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27386 (or 27382 counting only the distinct ones).

The product of its digits is 762048, while the sum is 51.

The square root of 1897134792 is about 43556.1108456667. The cubic root of 1897134792 is about 1237.9394306777.

The spelling of 1897134792 in words is "one billion, eight hundred ninety-seven million, one hundred thirty-four thousand, seven hundred ninety-two".