1378340 has 12 divisors (see below), whose sum is σ = 2894556. Its totient is φ = 551328.

The previous prime is 1378339. The next prime is 1378373. The reversal of 1378340 is 438731.

It can be written as a sum of positive squares in 2 ways, for example, as 487204 + 891136 = 698^2 + 944^2 .

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, 34439 + ... + 34478.

It is an arithmetic number, because the mean of its divisors is an integer number (241213).

2^1378340 is an apocalyptic number.

1378340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1378340 is an abundant number, since it is smaller than the sum of its proper divisors (1516216).

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

1378340 is a wasteful number, since it uses less digits than its factorization.

1378340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68926 (or 68924 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 1378340 is about 1174.0272569238. The cubic root of 1378340 is about 111.2889692206.

The spelling of 1378340 in words is "one million, three hundred seventy-eight thousand, three hundred forty".