140108640 has 384 divisors, whose sum is σ = 551577600. Its totient is φ = 29804544.

The previous prime is 140108629. The next prime is 140108651. The reversal of 140108640 is 46801041.

It is an interprime number because it is at equal distance from previous prime (140108629) and next prime (140108651).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 140108640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3786702 + ... + 3786738.

It is an arithmetic number, because the mean of its divisors is an integer number (1436400).

Almost surely, 2^140108640 is an apocalyptic number.

140108640 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 140108640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275788800).

140108640 is an abundant number, since it is smaller than the sum of its proper divisors (411468960).

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

140108640 is a wasteful number, since it uses less digits than its factorization.

140108640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 140108640 is about 11836.7495538260. The cubic root of 140108640 is about 519.3836879720.

Adding to 140108640 its reverse (46801041), we get a palindrome (186909681).

The spelling of 140108640 in words is "one hundred forty million, one hundred eight thousand, six hundred forty".