1378270980 has 36 divisors (see below), whose sum is σ = 4180755852. Its totient is φ = 367538880.

The previous prime is 1378270973. The next prime is 1378270997. The reversal of 1378270980 is 890728731.

1378270980 is a `hidden beast` number, since 1 + 378 + 270 + 9 + 8 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 393943104 + 984327876 = 19848^2 + 31374^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3828351 + ... + 3828710.

It is an arithmetic number, because the mean of its divisors is an integer number (116132107).

Almost surely, 2^1378270980 is an apocalyptic number.

1378270980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1378270980 is an abundant number, since it is smaller than the sum of its proper divisors (2802484872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1378270980 is a wasteful number, since it uses less digits than its factorization.

1378270980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7657076 (or 7657071 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 1378270980 is about 37125.0721211421. The cubic root of 1378270980 is about 1112.8711160132.

The spelling of 1378270980 in words is "one billion, three hundred seventy-eight million, two hundred seventy thousand, nine hundred eighty".