1378278314 has 16 divisors (see below), whose sum is σ = 2365521408. Its totient is φ = 590001072.

The previous prime is 1378278313. The next prime is 1378278323. The reversal of 1378278314 is 4138728731.

It is a super-2 number, since 2×1378278314² = 3799302221685365192, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1378278313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44957 + ... + 69120.

It is an arithmetic number, because the mean of its divisors is an integer number (147845088).

Almost surely, 2^1378278314 is an apocalyptic number.

1378278314 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1378278314 is a deficient number, since it is larger than the sum of its proper divisors (987243094).

1378278314 is a wasteful number, since it uses less digits than its factorization.

1378278314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114949.

The product of its digits is 225792, while the sum is 44.

The square root of 1378278314 is about 37125.1708952296. The cubic root of 1378278314 is about 1112.8730899314.

The spelling of 1378278314 in words is "one billion, three hundred seventy-eight million, two hundred seventy-eight thousand, three hundred fourteen".