140007646 has 4 divisors (see below), whose sum is σ = 210011472. Its totient is φ = 70003822.

The previous prime is 140007643. The next prime is 140007683. The reversal of 140007646 is 646700041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 646700041 = 13 ⋅49746157.

It is a super-3 number, since 3×140007646³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140007641) 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 as a sum of consecutive naturals, namely, 35001910 + ... + 35001913.

It is an arithmetic number, because the mean of its divisors is an integer number (52502868).

Almost surely, 2^140007646 is an apocalyptic number.

140007646 is a deficient number, since it is larger than the sum of its proper divisors (70003826).

140007646 is an equidigital number, since it uses as much as digits as its factorization.

140007646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70003825.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 140007646 is about 11832.4826642594. The cubic root of 140007646 is about 519.2588628249.

Adding to 140007646 its reverse (646700041), we get a palindrome (786707687).

The spelling of 140007646 in words is "one hundred forty million, seven thousand, six hundred forty-six".