1378423678 has 32 divisors (see below), whose sum is σ = 2167699968. Its totient is φ = 656762400.

The previous prime is 1378423643. The next prime is 1378423687. The reversal of 1378423678 is 8763248731.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 876633 + ... + 878203.

It is an arithmetic number, because the mean of its divisors is an integer number (67740624).

Almost surely, 2^1378423678 is an apocalyptic number.

1378423678 is a deficient number, since it is larger than the sum of its proper divisors (789276290).

1378423678 is a wasteful number, since it uses less digits than its factorization.

1378423678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848.

The product of its digits is 1354752, while the sum is 49.

The square root of 1378423678 is about 37127.1285989100. The cubic root of 1378423678 is about 1112.9122126531.

The spelling of 1378423678 in words is "one billion, three hundred seventy-eight million, four hundred twenty-three thousand, six hundred seventy-eight".