5209940856 has 16 divisors (see below), whose sum is σ = 13024852200. Its totient is φ = 1736646944.

The previous prime is 5209940849. The next prime is 5209940891. The reversal of 5209940856 is 6580499025.

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, 108540411 + ... + 108540458.

Almost surely, 2^5209940856 is an apocalyptic number.

It is an amenable number.

5209940856 is an abundant number, since it is smaller than the sum of its proper divisors (7814911344).

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

5209940856 is a wasteful number, since it uses less digits than its factorization.

5209940856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217080878 (or 217080874 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 48.

The square root of 5209940856 is about 72179.9200332059. The cubic root of 5209940856 is about 1733.5815025667.

The spelling of 5209940856 in words is "five billion, two hundred nine million, nine hundred forty thousand, eight hundred fifty-six".