140171640 has 64 divisors (see below), whose sum is σ = 480591360. Its totient is φ = 32039040.

The previous prime is 140171623. The next prime is 140171657. The reversal of 140171640 is 46171041.

140171640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (140171623) and next prime (140171657).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 140171640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82596 + ... + 84275.

It is an arithmetic number, because the mean of its divisors is an integer number (7509240).

Almost surely, 2^140171640 is an apocalyptic number.

140171640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140171640 is an abundant number, since it is smaller than the sum of its proper divisors (340419720).

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

140171640 is a wasteful number, since it uses less digits than its factorization.

140171640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166892 (or 166888 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 140171640 is about 11839.4104582956. The cubic root of 140171640 is about 519.4615234507.

140171640 divided by its sum of digits (24) gives a palindrome (5840485).

The spelling of 140171640 in words is "one hundred forty million, one hundred seventy-one thousand, six hundred forty".