140307840 has 96 divisors (see below), whose sum is σ = 484520400. Its totient is φ = 37413888.

The previous prime is 140307803. The next prime is 140307847. The reversal of 140307840 is 48703041.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140307847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6420 + ... + 17939.

Almost surely, 2^140307840 is an apocalyptic number.

140307840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140307840 is an abundant number, since it is smaller than the sum of its proper divisors (344212560).

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

140307840 is a wasteful number, since it uses less digits than its factorization.

140307840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24384 (or 24369 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 140307840 is about 11845.1610373182. The cubic root of 140307840 is about 519.6297166661.

The spelling of 140307840 in words is "one hundred forty million, three hundred seven thousand, eight hundred forty".