140931388 has 24 divisors (see below), whose sum is σ = 266222880. Its totient is φ = 64893120.

The previous prime is 140931383. The next prime is 140931389. The reversal of 140931388 is 883139041.

It is a super-2 number, since 2×140931388² = 39723312247213088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140931383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21033 + ... + 26911.

It is an arithmetic number, because the mean of its divisors is an integer number (11092620).

Almost surely, 2^140931388 is an apocalyptic number.

It is an amenable number.

140931388 is a deficient number, since it is larger than the sum of its proper divisors (125291492).

140931388 is a wasteful number, since it uses less digits than its factorization.

140931388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6357 (or 6355 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 140931388 is about 11871.4526491074. The cubic root of 140931388 is about 520.3983486113.

The spelling of 140931388 in words is "one hundred forty million, nine hundred thirty-one thousand, three hundred eighty-eight".