1378901744 has 160 divisors (see below), whose sum is σ = 3240864000. Its totient is φ = 561254400.

The previous prime is 1378901743. The next prime is 1378901749. The reversal of 1378901744 is 4471098731.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 1378901695 and 1378901704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378901743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5721464 + ... + 5721704.

It is an arithmetic number, because the mean of its divisors is an integer number (20255400).

Almost surely, 2^1378901744 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 1378901744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1620432000).

1378901744 is an abundant number, since it is smaller than the sum of its proper divisors (1861962256).

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

1378901744 is a wasteful number, since it uses less digits than its factorization.

1378901744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 1378901744 is about 37133.5662709630. The cubic root of 1378901744 is about 1113.0408581492.

The spelling of 1378901744 in words is "one billion, three hundred seventy-eight million, nine hundred one thousand, seven hundred forty-four".