1378113440 has 48 divisors (see below), whose sum is σ = 3551778720. Its totient is φ = 501131520.

The previous prime is 1378113439. The next prime is 1378113467. The reversal of 1378113440 is 443118731.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 1378113397 and 1378113406.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389750 + ... + 393269.

It is an arithmetic number, because the mean of its divisors is an integer number (73995390).

Almost surely, 2^1378113440 is an apocalyptic number.

1378113440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1378113440 is an abundant number, since it is smaller than the sum of its proper divisors (2173665280).

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

1378113440 is a wasteful number, since it uses less digits than its factorization.

1378113440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783045 (or 783037 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 1378113440 is about 37122.9503137884. The cubic root of 1378113440 is about 1112.8287130319.

The spelling of 1378113440 in words is "one billion, three hundred seventy-eight million, one hundred thirteen thousand, four hundred forty".