140352660 has 108 divisors (see below), whose sum is σ = 495275508. Its totient is φ = 32078592.

The previous prime is 140352637. The next prime is 140352661. The reversal of 140352660 is 66253041.

It can be written as a sum of positive squares in 2 ways, for example, as 83832336 + 56520324 = 9156^2 + 7518^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140352661) 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 35 ways as a sum of consecutive naturals, for example, 864 + ... + 16776.

Almost surely, 2^140352660 is an apocalyptic number.

140352660 is a gapful number since it is divisible by the number (10) 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 140352660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247637754).

140352660 is an abundant number, since it is smaller than the sum of its proper divisors (354922848).

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

140352660 is a wasteful number, since it uses less digits than its factorization.

140352660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15942 (or 15930 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 140352660 is about 11847.0527980591. The cubic root of 140352660 is about 519.6850410263.

The spelling of 140352660 in words is "one hundred forty million, three hundred fifty-two thousand, six hundred sixty".