1891764352 has 64 divisors (see below), whose sum is σ = 4164048000. Its totient is φ = 851513344.

The previous prime is 1891764307. The next prime is 1891764353. The reversal of 1891764352 is 2534671981.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (1891764353) 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, 31149 + ... + 68947.

It is an arithmetic number, because the mean of its divisors is an integer number (65063250).

Almost surely, 2^1891764352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1891764352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2082024000).

1891764352 is an abundant number, since it is smaller than the sum of its proper divisors (2272283648).

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

1891764352 is a wasteful number, since it uses less digits than its factorization.

1891764352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37853 (or 37841 counting only the distinct ones).

The product of its digits is 362880, while the sum is 46.

The square root of 1891764352 is about 43494.4174808676. The cubic root of 1891764352 is about 1236.7702003378.

The spelling of 1891764352 in words is "one billion, eight hundred ninety-one million, seven hundred sixty-four thousand, three hundred fifty-two".