1378188260 has 12 divisors (see below), whose sum is σ = 2894195388. Its totient is φ = 551275296.

The previous prime is 1378188241. The next prime is 1378188263. The reversal of 1378188260 is 628818731.

It can be written as a sum of positive squares in 2 ways, for example, as 207590464 + 1170597796 = 14408^2 + 34214^2 .

It is not an unprimeable number, because it can be changed into a prime (1378188263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34454687 + ... + 34454726.

It is an arithmetic number, because the mean of its divisors is an integer number (241182949).

Almost surely, 2^1378188260 is an apocalyptic number.

1378188260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1378188260 is an abundant number, since it is smaller than the sum of its proper divisors (1516007128).

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

1378188260 is a wasteful number, since it uses less digits than its factorization.

1378188260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68909422 (or 68909420 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 1378188260 is about 37123.9580325159. The cubic root of 1378188260 is about 1112.8488517556.

The spelling of 1378188260 in words is "one billion, three hundred seventy-eight million, one hundred eighty-eight thousand, two hundred sixty".