1393680 has 40 divisors (see below), whose sum is σ = 4321152. Its totient is φ = 371584.

The previous prime is 1393663. The next prime is 1393681. The reversal of 1393680 is 863931.

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

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1393681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2664 + ... + 3143.

2^1393680 is an apocalyptic number.

1393680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1393680 is an abundant number, since it is smaller than the sum of its proper divisors (2927472).

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

1393680 is a wasteful number, since it uses less digits than its factorization.

1393680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5823 (or 5817 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1393680 is about 1180.5422482910. The cubic root of 1393680 is about 111.7003042149.

The spelling of 1393680 in words is "one million, three hundred ninety-three thousand, six hundred eighty".