1378108138 has 16 divisors (see below), whose sum is σ = 2259416736. Its totient is φ = 625209840.

The previous prime is 1378108097. The next prime is 1378108183. The reversal of 1378108138 is 8318018731.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1378108138.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48381 + ... + 71392.

It is an arithmetic number, because the mean of its divisors is an integer number (141213546).

Almost surely, 2^1378108138 is an apocalyptic number.

1378108138 is a deficient number, since it is larger than the sum of its proper divisors (881308598).

1378108138 is a wasteful number, since it uses less digits than its factorization.

1378108138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120309.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 1378108138 is about 37122.8789023696. The cubic root of 1378108138 is about 1112.8272859057.

The spelling of 1378108138 in words is "one billion, three hundred seventy-eight million, one hundred eight thousand, one hundred thirty-eight".