1333721928 has 192 divisors, whose sum is σ = 4301199360. Its totient is φ = 334800000.

The previous prime is 1333721911. The next prime is 1333721933. The reversal of 1333721928 is 8291273331.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1775553 + ... + 1776303.

It is an arithmetic number, because the mean of its divisors is an integer number (22402080).

Almost surely, 2^1333721928 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 1333721928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2150599680).

1333721928 is an abundant number, since it is smaller than the sum of its proper divisors (2967477432).

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

1333721928 is a wasteful number, since it uses less digits than its factorization.

1333721928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840 (or 805 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 1333721928 is about 36520.1578309842. The cubic root of 1333721928 is about 1100.7493318554.

The spelling of 1333721928 in words is "one billion, three hundred thirty-three million, seven hundred twenty-one thousand, nine hundred twenty-eight".