1921252704 has 96 divisors (see below), whose sum is σ = 5821030656. Its totient is φ = 543475200.

The previous prime is 1921252667. The next prime is 1921252733. The reversal of 1921252704 is 4072521291.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53719 + ... + 82025.

It is an arithmetic number, because the mean of its divisors is an integer number (60635736).

Almost surely, 2^1921252704 is an apocalyptic number.

1921252704 is a gapful number since it is divisible by the number (14) 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 1921252704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2910515328).

1921252704 is an abundant number, since it is smaller than the sum of its proper divisors (3899777952).

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

1921252704 is a wasteful number, since it uses less digits than its factorization.

1921252704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28428 (or 28420 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 1921252704 is about 43832.0967328737. The cubic root of 1921252704 is about 1243.1632521284.

Adding to 1921252704 its reverse (4072521291), we get a palindrome (5993773995).

The spelling of 1921252704 in words is "one billion, nine hundred twenty-one million, two hundred fifty-two thousand, seven hundred four".