1378716428 has 6 divisors (see below), whose sum is σ = 2412753756. Its totient is φ = 689358212.

The previous prime is 1378716379. The next prime is 1378716467. The reversal of 1378716428 is 8246178731.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172339550 + ... + 172339557.

It is an arithmetic number, because the mean of its divisors is an integer number (402125626).

Almost surely, 2^1378716428 is an apocalyptic number.

It is an amenable number.

1378716428 is a deficient number, since it is larger than the sum of its proper divisors (1034037328).

1378716428 is a wasteful number, since it uses less digits than its factorization.

1378716428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344679111 (or 344679109 counting only the distinct ones).

The product of its digits is 451584, while the sum is 47.

The square root of 1378716428 is about 37131.0709244966. The cubic root of 1378716428 is about 1112.9909939435.

The spelling of 1378716428 in words is "one billion, three hundred seventy-eight million, seven hundred sixteen thousand, four hundred twenty-eight".