140439388 has 12 divisors (see below), whose sum is σ = 245948472. Its totient is φ = 70168400.

The previous prime is 140439359. The next prime is 140439401. The reversal of 140439388 is 883934041.

It is a self number, because there is not a number n which added to its sum of digits gives 140439388.

It is a congruent number.

It is an unprimeable number.

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, 6295 + ... + 17902.

It is an arithmetic number, because the mean of its divisors is an integer number (20495706).

Almost surely, 2^140439388 is an apocalyptic number.

It is an amenable number.

140439388 is a deficient number, since it is larger than the sum of its proper divisors (105509084).

140439388 is a wasteful number, since it uses less digits than its factorization.

140439388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25652 (or 25650 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 140439388 is about 11850.7125524164. The cubic root of 140439388 is about 519.7920618310.

The spelling of 140439388 in words is "one hundred forty million, four hundred thirty-nine thousand, three hundred eighty-eight".