1405680 has 40 divisors (see below), whose sum is σ = 4358352. Its totient is φ = 374784.

The previous prime is 1405669. The next prime is 1405681. The reversal of 1405680 is 865041.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1405680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405681) 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 7 ways as a sum of consecutive naturals, for example, 2689 + ... + 3168.

2^1405680 is an apocalyptic number.

1405680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1405680 is an abundant number, since it is smaller than the sum of its proper divisors (2952672).

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

1405680 is a wasteful number, since it uses less digits than its factorization.

1405680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5873 (or 5867 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1405680 is about 1185.6137651023. The cubic root of 1405680 is about 112.0199794289.

The spelling of 1405680 in words is "one million, four hundred five thousand, six hundred eighty".