1381904328 has 64 divisors (see below), whose sum is σ = 3978501120. Its totient is φ = 391809600.

The previous prime is 1381904327. The next prime is 1381904353. The reversal of 1381904328 is 8234091831.

1381904328 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1381904327) 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, 9388 + ... + 53403.

It is an arithmetic number, because the mean of its divisors is an integer number (62164080).

Almost surely, 2^1381904328 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 1381904328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1989250560).

1381904328 is an abundant number, since it is smaller than the sum of its proper divisors (2596596792).

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

1381904328 is a wasteful number, since it uses less digits than its factorization.

1381904328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62938 (or 62934 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 1381904328 is about 37173.9737988825. The cubic root of 1381904328 is about 1113.8481614644.

The spelling of 1381904328 in words is "one billion, three hundred eighty-one million, nine hundred four thousand, three hundred twenty-eight".