1378280 has 16 divisors (see below), whose sum is σ = 3101220. Its totient is φ = 551296.

The previous prime is 1378277. The next prime is 1378301. The reversal of 1378280 is 828731.

It can be written as a sum of positive squares in 2 ways, for example, as 1378276 + 4 = 1174^2 + 2^2 .

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, 17189 + ... + 17268.

2^1378280 is an apocalyptic number.

1378280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1378280 is an abundant number, since it is smaller than the sum of its proper divisors (1722940).

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

1378280 is a wasteful number, since it uses less digits than its factorization.

1378280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34468 (or 34464 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1378280 is about 1174.0017035763. The cubic root of 1378280 is about 111.2873543711.

The spelling of 1378280 in words is "one million, three hundred seventy-eight thousand, two hundred eighty".