1378429616 has 20 divisors (see below), whose sum is σ = 2676075000. Its totient is φ = 687829632.

The previous prime is 1378429529. The next prime is 1378429621. The reversal of 1378429616 is 6169248731.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78341 + ... + 94308.

It is an arithmetic number, because the mean of its divisors is an integer number (133803750).

Almost surely, 2^1378429616 is an apocalyptic number.

1378429616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1378429616 is a deficient number, since it is larger than the sum of its proper divisors (1297645384).

1378429616 is a wasteful number, since it uses less digits than its factorization.

1378429616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173156 (or 173150 counting only the distinct ones).

The product of its digits is 435456, while the sum is 47.

The square root of 1378429616 is about 37127.2085673028. The cubic root of 1378429616 is about 1112.9138107257.

The spelling of 1378429616 in words is "one billion, three hundred seventy-eight million, four hundred twenty-nine thousand, six hundred sixteen".