2020705840 has 40 divisors (see below), whose sum is σ = 4750945920. Its totient is φ = 799197696.

The previous prime is 2020705831. The next prime is 2020705861. The reversal of 2020705840 is 485070202.

It is a tau number, because it is divible by the number of its divisors (40).

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 2020705799 and 2020705808.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 134784 + ... + 149023.

It is an arithmetic number, because the mean of its divisors is an integer number (118773648).

Almost surely, 2^2020705840 is an apocalyptic number.

2020705840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2020705840 is an abundant number, since it is smaller than the sum of its proper divisors (2730240080).

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

2020705840 is a wasteful number, since it uses less digits than its factorization.

2020705840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283909 (or 283903 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 2020705840 is about 44952.2617895919. The cubic root of 2020705840 is about 1264.2540848771.

The spelling of 2020705840 in words is "two billion, twenty million, seven hundred five thousand, eight hundred forty".