1408140 has 36 divisors (see below), whose sum is σ = 4271904. Its totient is φ = 375456.

The previous prime is 1408123. The next prime is 1408151. The reversal of 1408140 is 418041.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 3732 + ... + 4091.

It is an arithmetic number, because the mean of its divisors is an integer number (118664).

2^1408140 is an apocalyptic number.

1408140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1408140 is an abundant number, since it is smaller than the sum of its proper divisors (2863764).

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

1408140 is a wasteful number, since it uses less digits than its factorization.

1408140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7838 (or 7833 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1408140 is about 1186.6507489569. The cubic root of 1408140 is about 112.0852879280.

Subtracting from 1408140 its reverse (418041), we obtain a palindrome (990099).

The spelling of 1408140 in words is "one million, four hundred eight thousand, one hundred forty".