1397984 has 36 divisors (see below), whose sum is σ = 3185784. Its totient is φ = 591552.

The previous prime is 1397983. The next prime is 1397989. The reversal of 1397984 is 4897931.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17657 + ... + 17735.

It is an arithmetic number, because the mean of its divisors is an integer number (88494).

2^1397984 is an apocalyptic number.

1397984 is a gapful number since it is divisible by the number (14) 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 1397984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1592892).

1397984 is an abundant number, since it is smaller than the sum of its proper divisors (1787800).

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

1397984 is an frugal number, since it uses more digits than its factorization.

1397984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175 (or 88 counting only the distinct ones).

The product of its digits is 54432, while the sum is 41.

The square root of 1397984 is about 1182.3637342206. The cubic root of 1397984 is about 111.8151713437.

The spelling of 1397984 in words is "one million, three hundred ninety-seven thousand, nine hundred eighty-four".