140991138 has 32 divisors (see below), whose sum is σ = 316368000. Its totient is φ = 46538928.

The previous prime is 140991121. The next prime is 140991157. The reversal of 140991138 is 831199041.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7113 + ... + 18236.

It is an arithmetic number, because the mean of its divisors is an integer number (9886500).

Almost surely, 2^140991138 is an apocalyptic number.

140991138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

140991138 is an abundant number, since it is smaller than the sum of its proper divisors (175376862).

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

140991138 is a wasteful number, since it uses less digits than its factorization.

140991138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25463 (or 25457 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 140991138 is about 11873.9689236582. The cubic root of 140991138 is about 520.4718818120.

The spelling of 140991138 in words is "one hundred forty million, nine hundred ninety-one thousand, one hundred thirty-eight".