140105538 has 24 divisors (see below), whose sum is σ = 314806128. Its totient is φ = 46701684.

The previous prime is 140105521. The next prime is 140105557. The reversal of 140105538 is 835501041.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 11 ways as a sum of consecutive naturals, for example, 143656 + ... + 144627.

It is an arithmetic number, because the mean of its divisors is an integer number (13116922).

Almost surely, 2^140105538 is an apocalyptic number.

140105538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

140105538 is an abundant number, since it is smaller than the sum of its proper divisors (174700590).

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

140105538 is an equidigital number, since it uses as much as digits as its factorization.

140105538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288300 (or 288288 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 140105538 is about 11836.6185205066. The cubic root of 140105538 is about 519.3798548986.

Adding to 140105538 its reverse (835501041), we get a palindrome (975606579).

The spelling of 140105538 in words is "one hundred forty million, one hundred five thousand, five hundred thirty-eight".