140705280 has 240 divisors, whose sum is σ = 505574784. Its totient is φ = 36126720.

The previous prime is 140705267. The next prime is 140705281. The reversal of 140705280 is 82507041.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140705281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 714142 + ... + 714338.

Almost surely, 2^140705280 is an apocalyptic number.

140705280 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 140705280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252787392).

140705280 is an abundant number, since it is smaller than the sum of its proper divisors (364869504).

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

140705280 is a wasteful number, since it uses less digits than its factorization.

140705280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 140705280 is about 11861.9256446835. The cubic root of 140705280 is about 520.1198934593.

The spelling of 140705280 in words is "one hundred forty million, seven hundred five thousand, two hundred eighty".