140431424 has 56 divisors (see below), whose sum is σ = 337230720. Its totient is φ = 56641536.

The previous prime is 140431411. The next prime is 140431429. The reversal of 140431424 is 424134041.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a self number, because there is not a number n which added to its sum of digits gives 140431424.

It is not an unprimeable number, because it can be changed into a prime (140431429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1604 + ... + 16835.

Almost surely, 2^140431424 is an apocalyptic number.

140431424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

140431424 is an abundant number, since it is smaller than the sum of its proper divisors (196799296).

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

140431424 is a wasteful number, since it uses less digits than its factorization.

140431424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18475 (or 18465 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 140431424 is about 11850.3765341022. The cubic root of 140431424 is about 519.7822362346.

Adding to 140431424 its reverse (424134041), we get a palindrome (564565465).

The spelling of 140431424 in words is "one hundred forty million, four hundred thirty-one thousand, four hundred twenty-four".