140132640 has 96 divisors (see below), whose sum is σ = 456684480. Its totient is φ = 36076544.

The previous prime is 140132639. The next prime is 140132647. The reversal of 140132640 is 46231041.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (140132647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8887 + ... + 18953.

It is an arithmetic number, because the mean of its divisors is an integer number (4757130).

Almost surely, 2^140132640 is an apocalyptic number.

140132640 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 140132640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228342240).

140132640 is an abundant number, since it is smaller than the sum of its proper divisors (316551840).

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

140132640 is a wasteful number, since it uses less digits than its factorization.

140132640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10114 (or 10106 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 140132640 is about 11837.7633022459. The cubic root of 140132640 is about 519.4133423336.

Adding to 140132640 its reverse (46231041), we get a palindrome (186363681).

It can be divided in two parts, 14013 and 2640, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 140132640 in words is "one hundred forty million, one hundred thirty-two thousand, six hundred forty".