140006838 has 32 divisors (see below), whose sum is σ = 290396160. Its totient is φ = 44946720.

The previous prime is 140006837. The next prime is 140006857. The reversal of 140006838 is 838600041.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140006831) 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 15 ways as a sum of consecutive naturals, for example, 94443 + ... + 95913.

It is an arithmetic number, because the mean of its divisors is an integer number (9074880).

Almost surely, 2^140006838 is an apocalyptic number.

140006838 is an abundant number, since it is smaller than the sum of its proper divisors (150389322).

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

140006838 is a wasteful number, since it uses less digits than its factorization.

140006838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 140006838 is about 11832.4485209106. The cubic root of 140006838 is about 519.2578639224.

Adding to 140006838 its reverse (838600041), we get a palindrome (978606879).

The spelling of 140006838 in words is "one hundred forty million, six thousand, eight hundred thirty-eight".