1373451648 has 128 divisors (see below), whose sum is σ = 3759866880. Its totient is φ = 443971584.

The previous prime is 1373451623. The next prime is 1373451659. The reversal of 1373451648 is 8461543731.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3681990 + ... + 3682362.

It is an arithmetic number, because the mean of its divisors is an integer number (29373960).

Almost surely, 2^1373451648 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 1373451648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1879933440).

1373451648 is an abundant number, since it is smaller than the sum of its proper divisors (2386415232).

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

1373451648 is a wasteful number, since it uses less digits than its factorization.

1373451648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656 (or 644 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 1373451648 is about 37060.1085805209. The cubic root of 1373451648 is about 1111.5724940874.

The spelling of 1373451648 in words is "one billion, three hundred seventy-three million, four hundred fifty-one thousand, six hundred forty-eight".