140431328 has 24 divisors (see below), whose sum is σ = 281163960. Its totient is φ = 69024640.

The previous prime is 140431327. The next prime is 140431367. The reversal of 140431328 is 823134041.

It is a junction number, because it is equal to n+sod(n) for n = 140431297 and 140431306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140431321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35303 + ... + 39078.

It is an arithmetic number, because the mean of its divisors is an integer number (11715165).

Almost surely, 2^140431328 is an apocalyptic number.

It is an amenable number.

140431328 is an abundant number, since it is smaller than the sum of its proper divisors (140732632).

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

140431328 is an equidigital number, since it uses as much as digits as its factorization.

140431328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74450 (or 74442 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 140431328 is about 11850.3724835973. The cubic root of 140431328 is about 519.7821177922.

Adding to 140431328 its reverse (823134041), we get a palindrome (963565369).

The spelling of 140431328 in words is "one hundred forty million, four hundred thirty-one thousand, three hundred twenty-eight".