140408 has 8 divisors (see below), whose sum is σ = 263280. Its totient is φ = 70200.

The previous prime is 140407. The next prime is 140411. The reversal of 140408 is 804041.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 16.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140401) by changing a digit.

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 as a sum of consecutive naturals, namely, 8768 + ... + 8783.

It is an arithmetic number, because the mean of its divisors is an integer number (32910).

2¹⁴⁰⁴⁰⁸ is an apocalyptic number.

It is an amenable number.

140408 is a deficient number, since it is larger than the sum of its proper divisors (122872).

140408 is a wasteful number, since it uses less digits than its factorization.

140408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17557 (or 17553 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 140408 is about 374.7105549621. The cubic root of 140408 is about 51.9753334688.

Adding to 140408 its reverse (804041), we get a palindrome (944449).

The spelling of 140408 in words is "one hundred forty thousand, four hundred eight".