1396278 has 72 divisors (see below), whose sum is σ = 3597048. Its totient is φ = 404352.

The previous prime is 1396273. The next prime is 1396301. The reversal of 1396278 is 8726931.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1396273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 82126 + ... + 82142.

It is an arithmetic number, because the mean of its divisors is an integer number (49959).

2^1396278 is an apocalyptic number.

1396278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1396278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1798524).

1396278 is an abundant number, since it is smaller than the sum of its proper divisors (2200770).

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

1396278 is a wasteful number, since it uses less digits than its factorization.

1396278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60 (or 35 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 1396278 is about 1181.6420777884. The cubic root of 1396278 is about 111.7696690751.

The spelling of 1396278 in words is "one million, three hundred ninety-six thousand, two hundred seventy-eight".