247880866 has 8 divisors (see below), whose sum is σ = 375503004. Its totient is φ = 122713200.

The previous prime is 247880851. The next prime is 247880879. The reversal of 247880866 is 668088742.

247880866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 247149841 + 731025 = 15721^2 + 855^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×247880866² = 122889847457819912, which contains 22 as substring.

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, 613365 + ... + 613768.

Almost surely, 2^247880866 is an apocalyptic number.

247880866 is a deficient number, since it is larger than the sum of its proper divisors (127622138).

247880866 is a wasteful number, since it uses less digits than its factorization.

247880866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227236.

The product of its (nonzero) digits is 1032192, while the sum is 49.

The square root of 247880866 is about 15744.2327853726. The cubic root of 247880866 is about 628.1755108048.

The spelling of 247880866 in words is "two hundred forty-seven million, eight hundred eighty thousand, eight hundred sixty-six".