140502640 has 40 divisors (see below), whose sum is σ = 329264640. Its totient is φ = 55754496.

The previous prime is 140502617. The next prime is 140502641. The reversal of 140502640 is 46205041.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140502641) 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, 3246 + ... + 17074.

It is an arithmetic number, because the mean of its divisors is an integer number (8231616).

Almost surely, 2^140502640 is an apocalyptic number.

140502640 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 140502640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164632320).

140502640 is an abundant number, since it is smaller than the sum of its proper divisors (188762000).

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

140502640 is a wasteful number, since it uses less digits than its factorization.

140502640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13969 (or 13963 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 140502640 is about 11853.3809522853. The cubic root of 140502640 is about 519.8700858888.

Adding to 140502640 its reverse (46205041), we get a palindrome (186707681).

The spelling of 140502640 in words is "one hundred forty million, five hundred two thousand, six hundred forty".