1381513128 has 16 divisors (see below), whose sum is σ = 3453782880. Its totient is φ = 460504368.

The previous prime is 1381513127. The next prime is 1381513151. The reversal of 1381513128 is 8213151831.

It is not an unprimeable number, because it can be changed into a prime (1381513127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28781500 + ... + 28781547.

It is an arithmetic number, because the mean of its divisors is an integer number (215861430).

Almost surely, 2^1381513128 is an apocalyptic number.

It is an amenable number.

1381513128 is an abundant number, since it is smaller than the sum of its proper divisors (2072269752).

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

1381513128 is a wasteful number, since it uses less digits than its factorization.

1381513128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57563056 (or 57563052 counting only the distinct ones).

The product of its digits is 5760, while the sum is 33.

The square root of 1381513128 is about 37168.7116806596. The cubic root of 1381513128 is about 1113.7430460050.

Adding to 1381513128 its reverse (8213151831), we get a palindrome (9594664959).

The spelling of 1381513128 in words is "one billion, three hundred eighty-one million, five hundred thirteen thousand, one hundred twenty-eight".