140688240 has 320 divisors, whose sum is σ = 569106432. Its totient is φ = 27878400.

The previous prime is 140688227. The next prime is 140688241. The reversal of 140688240 is 42886041.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140688241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 424875 + ... + 425205.

Almost surely, 2^140688240 is an apocalyptic number.

140688240 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 140688240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284553216).

140688240 is an abundant number, since it is smaller than the sum of its proper divisors (428418192).

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

140688240 is a wasteful number, since it uses less digits than its factorization.

140688240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 140688240 is about 11861.2073584437. The cubic root of 140688240 is about 520.0988963775.

The spelling of 140688240 in words is "one hundred forty million, six hundred eighty-eight thousand, two hundred forty".