140440506 has 8 divisors (see below), whose sum is σ = 280881024. Its totient is φ = 46813500.

The previous prime is 140440501. The next prime is 140440529. The reversal of 140440506 is 605044041.

It is a sphenic number, since it is the product of 3 distinct primes.

140440506 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (140440501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11703370 + ... + 11703381.

It is an arithmetic number, because the mean of its divisors is an integer number (35110128).

Almost surely, 2^140440506 is an apocalyptic number.

140440506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

140440506 is a wasteful number, since it uses less digits than its factorization.

140440506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23406756.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 140440506 is about 11850.7597224819. The cubic root of 140440506 is about 519.7934411353.

Adding to 140440506 its reverse (605044041), we get a palindrome (745484547).

The spelling of 140440506 in words is "one hundred forty million, four hundred forty thousand, five hundred six".