1378788012 has 72 divisors (see below), whose sum is σ = 4000878336. Its totient is φ = 392187744.

The previous prime is 1378788007. The next prime is 1378788031. The reversal of 1378788012 is 2108878731.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45153 + ... + 69255.

Almost surely, 2^1378788012 is an apocalyptic number.

1378788012 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 1378788012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2000439168).

1378788012 is an abundant number, since it is smaller than the sum of its proper divisors (2622090324).

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

1378788012 is a wasteful number, since it uses less digits than its factorization.

1378788012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24347 (or 24342 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The square root of 1378788012 is about 37132.0348486317. The cubic root of 1378788012 is about 1113.0102560549.

The spelling of 1378788012 in words is "one billion, three hundred seventy-eight million, seven hundred eighty-eight thousand, twelve".