1378040 has 32 divisors (see below), whose sum is σ = 3170880. Its totient is φ = 538752.

The previous prime is 1378033. The next prime is 1378057. The reversal of 1378040 is 408731.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1377997 and 1378015.

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, 1514 + ... + 2246.

It is an arithmetic number, because the mean of its divisors is an integer number (99090).

2^1378040 is an apocalyptic number.

1378040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1378040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1585440).

1378040 is an abundant number, since it is smaller than the sum of its proper divisors (1792840).

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

1378040 is a wasteful number, since it uses less digits than its factorization.

1378040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791 (or 787 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1378040 is about 1173.8994846238. The cubic root of 1378040 is about 111.2808945043.

The spelling of 1378040 in words is "one million, three hundred seventy-eight thousand, forty".