140643536 has 40 divisors (see below), whose sum is σ = 299460000. Its totient is φ = 63457920.

The previous prime is 140643521. The next prime is 140643541. The reversal of 140643536 is 635346041.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21590 + ... + 27338.

It is an arithmetic number, because the mean of its divisors is an integer number (7486500).

Almost surely, 2^140643536 is an apocalyptic number.

140643536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140643536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149730000).

140643536 is an abundant number, since it is smaller than the sum of its proper divisors (158816464).

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

140643536 is a wasteful number, since it uses less digits than its factorization.

140643536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5907 (or 5901 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 140643536 is about 11859.3227462617. The cubic root of 140643536 is about 520.0438030162.

Adding to 140643536 its reverse (635346041), we get a palindrome (775989577).

The spelling of 140643536 in words is "one hundred forty million, six hundred forty-three thousand, five hundred thirty-six".