140830638 has 16 divisors (see below), whose sum is σ = 303327696. Its totient is φ = 43332480.

The previous prime is 140830631. The next prime is 140830643. The reversal of 140830638 is 836038041.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 140830599 and 140830608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140830631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 902683 + ... + 902838.

It is an arithmetic number, because the mean of its divisors is an integer number (18957981).

Almost surely, 2^140830638 is an apocalyptic number.

140830638 is an abundant number, since it is smaller than the sum of its proper divisors (162497058).

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

140830638 is a wasteful number, since it uses less digits than its factorization.

140830638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805539.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 140830638 is about 11867.2085175917. The cubic root of 140830638 is about 520.2743103985.

Adding to 140830638 its reverse (836038041), we get a palindrome (976868679).

The spelling of 140830638 in words is "one hundred forty million, eight hundred thirty thousand, six hundred thirty-eight".