247234286856 has 128 divisors (see below), whose sum is σ = 649197020160. Its totient is φ = 78359270400.

The previous prime is 247234286833. The next prime is 247234286879. The reversal of 247234286856 is 658682432742.

It is an interprime number because it is at equal distance from previous prime (247234286833) and next prime (247234286879).

It is a super-2 number, since 2×247234286856² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247234286796 and 247234286805.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50691490 + ... + 50696366.

It is an arithmetic number, because the mean of its divisors is an integer number (5071851720).

Almost surely, 2^247234286856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247234286856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324598510080).

247234286856 is an abundant number, since it is smaller than the sum of its proper divisors (401962733304).

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

247234286856 is a wasteful number, since it uses less digits than its factorization.

247234286856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6095 (or 6091 counting only the distinct ones).

The product of its digits is 30965760, while the sum is 57.

The spelling of 247234286856 in words is "two hundred forty-seven billion, two hundred thirty-four million, two hundred eighty-six thousand, eight hundred fifty-six".