140543640 has 128 divisors (see below), whose sum is σ = 471744000. Its totient is φ = 37217664.

The previous prime is 140543633. The next prime is 140543647. The reversal of 140543640 is 46345041.

140543640 is a `hidden beast` number, since 14 + 0 + 5 + 4 + 3 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (140543633) and next prime (140543647).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140543647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 192957 + ... + 193683.

It is an arithmetic number, because the mean of its divisors is an integer number (3685500).

Almost surely, 2^140543640 is an apocalyptic number.

140543640 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 140543640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235872000).

140543640 is an abundant number, since it is smaller than the sum of its proper divisors (331200360).

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

140543640 is a wasteful number, since it uses less digits than its factorization.

140543640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926 (or 916 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 140543640 is about 11855.1102905034. The cubic root of 140543640 is about 519.9206486412.

Adding to 140543640 its reverse (46345041), we get a palindrome (186888681).

The spelling of 140543640 in words is "one hundred forty million, five hundred forty-three thousand, six hundred forty".