2061308440 has 16 divisors (see below), whose sum is σ = 4637944080. Its totient is φ = 824523360.

The previous prime is 2061308411. The next prime is 2061308471. The reversal of 2061308440 is 448031602.

It is a junction number, because it is equal to n+sod(n) for n = 2061308399 and 2061308408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25766316 + ... + 25766395.

It is an arithmetic number, because the mean of its divisors is an integer number (289871505).

Almost surely, 2^2061308440 is an apocalyptic number.

2061308440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2061308440 is an abundant number, since it is smaller than the sum of its proper divisors (2576635640).

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

2061308440 is a wasteful number, since it uses less digits than its factorization.

2061308440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51532722 (or 51532718 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 2061308440 is about 45401.6347723295. The cubic root of 2061308440 is about 1272.6656639380.

The spelling of 2061308440 in words is "two billion, sixty-one million, three hundred eight thousand, four hundred forty".