1394820 has 144 divisors (see below), whose sum is σ = 5136768. Its totient is φ = 311040.

The previous prime is 1394777. The next prime is 1394821. The reversal of 1394820 is 284931.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1394821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34000 + ... + 34040.

It is an arithmetic number, because the mean of its divisors is an integer number (35672).

2^1394820 is an apocalyptic number.

1394820 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 1394820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2568384).

1394820 is an abundant number, since it is smaller than the sum of its proper divisors (3741948).

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

1394820 is a wasteful number, since it uses less digits than its factorization.

1394820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1394820 is about 1181.0249785673. The cubic root of 1394820 is about 111.7307520563.

The spelling of 1394820 in words is "one million, three hundred ninety-four thousand, eight hundred twenty".