1378443312 has 160 divisors (see below), whose sum is σ = 4309248000. Its totient is φ = 420215040.

The previous prime is 1378443301. The next prime is 1378443323. The reversal of 1378443312 is 2133448731.

1378443312 is a `hidden beast` number, since 137 + 84 + 433 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (1378443301) and next prime (1378443323).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 235137 + ... + 240927.

It is an arithmetic number, because the mean of its divisors is an integer number (26932800).

Almost surely, 2^1378443312 is an apocalyptic number.

1378443312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1378443312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2154624000).

1378443312 is an abundant number, since it is smaller than the sum of its proper divisors (2930804688).

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

1378443312 is a wasteful number, since it uses less digits than its factorization.

1378443312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5856 (or 5844 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 1378443312 is about 37127.3930137843. The cubic root of 1378443312 is about 1112.9174966634.

The spelling of 1378443312 in words is "one billion, three hundred seventy-eight million, four hundred forty-three thousand, three hundred twelve".