1378978270 has 16 divisors (see below), whose sum is σ = 2562231168. Its totient is φ = 533797920.

The previous prime is 1378978243. The next prime is 1378978283. The reversal of 1378978270 is 728798731.

It is a congruent number.

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, 2223849 + ... + 2224468.

It is an arithmetic number, because the mean of its divisors is an integer number (160139448).

Almost surely, 2^1378978270 is an apocalyptic number.

1378978270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1378978270 is a deficient number, since it is larger than the sum of its proper divisors (1183252898).

1378978270 is a wasteful number, since it uses less digits than its factorization.

1378978270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4448355.

The product of its (nonzero) digits is 1185408, while the sum is 52.

The square root of 1378978270 is about 37134.5966721062. The cubic root of 1378978270 is about 1113.0614482044.

The spelling of 1378978270 in words is "one billion, three hundred seventy-eight million, nine hundred seventy-eight thousand, two hundred seventy".