140705820 has 108 divisors (see below), whose sum is σ = 439422984. Its totient is φ = 36443520.

The previous prime is 140705813. The next prime is 140705837. The reversal of 140705820 is 28507041.

140705820 is a `hidden beast` number, since 14 + 0 + 70 + 582 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 246135 + ... + 246705.

Almost surely, 2^140705820 is an apocalyptic number.

140705820 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 140705820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219711492).

140705820 is an abundant number, since it is smaller than the sum of its proper divisors (298717164).

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

140705820 is a wasteful number, since it uses less digits than its factorization.

140705820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660 (or 618 counting only the distinct ones).

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

The square root of 140705820 is about 11861.9484065646. The cubic root of 140705820 is about 520.1205588320.

The spelling of 140705820 in words is "one hundred forty million, seven hundred five thousand, eight hundred twenty".