1396880 has 40 divisors (see below), whose sum is σ = 3422400. Its totient is φ = 528768.

The previous prime is 1396877. The next prime is 1396903. The reversal of 1396880 is 886931.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 1396880.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1061 + ... + 1979.

It is an arithmetic number, because the mean of its divisors is an integer number (85560).

2^1396880 is an apocalyptic number.

1396880 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 1396880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1711200).

1396880 is an abundant number, since it is smaller than the sum of its proper divisors (2025520).

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

1396880 is a wasteful number, since it uses less digits than its factorization.

1396880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951 (or 945 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 1396880 is about 1181.8967806031. The cubic root of 1396880 is about 111.7857297911.

The spelling of 1396880 in words is "one million, three hundred ninety-six thousand, eight hundred eighty".