140637640 has 128 divisors (see below), whose sum is σ = 388281600. Its totient is φ = 45112320.

The previous prime is 140637613. The next prime is 140637643. The reversal of 140637640 is 46736041.

It is not an unprimeable number, because it can be changed into a prime (140637643) 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 31 ways as a sum of consecutive naturals, for example, 131026 + ... + 132094.

It is an arithmetic number, because the mean of its divisors is an integer number (3033450).

Almost surely, 2^140637640 is an apocalyptic number.

140637640 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 140637640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194140800).

140637640 is an abundant number, since it is smaller than the sum of its proper divisors (247643960).

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

140637640 is a wasteful number, since it uses less digits than its factorization.

140637640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127 (or 1123 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 140637640 is about 11859.0741628510. The cubic root of 140637640 is about 520.0365358944.

The spelling of 140637640 in words is "one hundred forty million, six hundred thirty-seven thousand, six hundred forty".