1381900828 has 72 divisors (see below), whose sum is σ = 3216731616. Its totient is φ = 506711040.

The previous prime is 1381900783. The next prime is 1381900841. The reversal of 1381900828 is 8280091831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45600 + ... + 69592.

It is an arithmetic number, because the mean of its divisors is an integer number (44676828).

Almost surely, 2^1381900828 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 1381900828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1608365808).

1381900828 is an abundant number, since it is smaller than the sum of its proper divisors (1834830788).

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

1381900828 is a wasteful number, since it uses less digits than its factorization.

1381900828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24043 (or 24030 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 1381900828 is about 37173.9267229062. The cubic root of 1381900828 is about 1113.8472211021.

It can be divided in two parts, 1381 and 900828, that added together give a palindrome (902209).

The spelling of 1381900828 in words is "one billion, three hundred eighty-one million, nine hundred thousand, eight hundred twenty-eight".