1378940 has 12 divisors (see below), whose sum is σ = 2895816. Its totient is φ = 551568.

The previous prime is 1378907. The next prime is 1378943. The reversal of 1378940 is 498731.

It is a junction number, because it is equal to n+sod(n) for n = 1378897 and 1378906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378943) 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, 34454 + ... + 34493.

It is an arithmetic number, because the mean of its divisors is an integer number (241318).

2^1378940 is an apocalyptic number.

1378940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1378940 is an abundant number, since it is smaller than the sum of its proper divisors (1516876).

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

1378940 is a wasteful number, since it uses less digits than its factorization.

1378940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68956 (or 68954 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1378940 is about 1174.2827598155. The cubic root of 1378940 is about 111.3051151389.

The spelling of 1378940 in words is "one million, three hundred seventy-eight thousand, nine hundred forty".