247646672 has 80 divisors (see below), whose sum is σ = 598295040. Its totient is φ = 96685056.

The previous prime is 247646671. The next prime is 247646717. The reversal of 247646672 is 276646742.

It is a super-2 number, since 2×247646672² = 122657748305351168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247646671) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 113948 + ... + 116100.

It is an arithmetic number, because the mean of its divisors is an integer number (7478688).

Almost surely, 2^247646672 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 247646672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299147520).

247646672 is an abundant number, since it is smaller than the sum of its proper divisors (350648368).

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

247646672 is a wasteful number, since it uses less digits than its factorization.

247646672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2260 (or 2254 counting only the distinct ones).

The product of its digits is 677376, while the sum is 44.

The square root of 247646672 is about 15736.7935742959. The cubic root of 247646672 is about 627.9776183079.

The spelling of 247646672 in words is "two hundred forty-seven million, six hundred forty-six thousand, six hundred seventy-two".