1378540 has 12 divisors (see below), whose sum is σ = 2894976. Its totient is φ = 551408.

The previous prime is 1378529. The next prime is 1378541. The reversal of 1378540 is 458731.

It is a junction number, because it is equal to n+sod(n) for n = 1378499 and 1378508.

It is not an unprimeable number, because it can be changed into a prime (1378541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34444 + ... + 34483.

It is an arithmetic number, because the mean of its divisors is an integer number (241248).

2^1378540 is an apocalyptic number.

1378540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1378540 is an abundant number, since it is smaller than the sum of its proper divisors (1516436).

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

1378540 is a wasteful number, since it uses less digits than its factorization.

1378540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68936 (or 68934 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 1378540 is about 1174.1124307323. The cubic root of 1378540 is about 111.2943517139.

The spelling of 1378540 in words is "one million, three hundred seventy-eight thousand, five hundred forty".