1381835648 has 32 divisors (see below), whose sum is σ = 2897769000. Its totient is φ = 654552576.

The previous prime is 1381835639. The next prime is 1381835677. The reversal of 1381835648 is 8465381831.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281663 + ... + 286526.

Almost surely, 2^1381835648 is an apocalyptic number.

It is an amenable number.

1381835648 is an abundant number, since it is smaller than the sum of its proper divisors (1515933352).

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

1381835648 is an equidigital number, since it uses as much as digits as its factorization.

1381835648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568222 (or 568210 counting only the distinct ones).

The product of its digits is 552960, while the sum is 47.

The square root of 1381835648 is about 37173.0500228324. The cubic root of 1381835648 is about 1113.8297085808.

The spelling of 1381835648 in words is "one billion, three hundred eighty-one million, eight hundred thirty-five thousand, six hundred forty-eight".