1378734 has 32 divisors (see below), whose sum is σ = 3338496. Its totient is φ = 370560.

The previous prime is 1378733. The next prime is 1378759. The reversal of 1378734 is 4378731.

It is a junction number, because it is equal to n+sod(n) for n = 1378695 and 1378704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252 + ... + 1679.

It is an arithmetic number, because the mean of its divisors is an integer number (104328).

2^1378734 is an apocalyptic number.

1378734 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1378734 is an abundant number, since it is smaller than the sum of its proper divisors (1959762).

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

1378734 is a wasteful number, since it uses less digits than its factorization.

1378734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960.

The product of its digits is 14112, while the sum is 33.

The square root of 1378734 is about 1174.1950434234. The cubic root of 1378734 is about 111.2995722350.

It can be divided in two parts, 1378 and 734, that added together give a palindrome (2112).

The spelling of 1378734 in words is "one million, three hundred seventy-eight thousand, seven hundred thirty-four".