140025640 has 24 divisors (see below), whose sum is σ = 315226170. Its totient is φ = 55980320.

The previous prime is 140025637. The next prime is 140025647. The reversal of 140025640 is 46520041.

It can be written as a sum of positive squares in only one way, i.e., 126023076 + 14002564 = 11226^2 + 3742^2 .

It is not an unprimeable number, because it can be changed into a prime (140025647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73905 + ... + 75775.

Almost surely, 2^140025640 is an apocalyptic number.

140025640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140025640 is an abundant number, since it is smaller than the sum of its proper divisors (175200530).

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

140025640 is an frugal number, since it uses more digits than its factorization.

140025640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3753 (or 1878 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 140025640 is about 11833.2430043501. The cubic root of 140025640 is about 519.2811071903.

Adding to 140025640 its reverse (46520041), we get a palindrome (186545681).

The spelling of 140025640 in words is "one hundred forty million, twenty-five thousand, six hundred forty".