247829864 has 8 divisors (see below), whose sum is σ = 464681010. Its totient is φ = 123914928.

The previous prime is 247829819. The next prime is 247829891. The reversal of 247829864 is 468928742.

247829864 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 only one way, i.e., 245172964 + 2656900 = 15658^2 + 1630^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×247829864² = 122839282980516992, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15489359 + ... + 15489374.

Almost surely, 2^247829864 is an apocalyptic number.

It is an amenable number.

247829864 is a deficient number, since it is larger than the sum of its proper divisors (216851146).

247829864 is a wasteful number, since it uses less digits than its factorization.

247829864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30978739 (or 30978735 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 50.

The square root of 247829864 is about 15742.6129978476. The cubic root of 247829864 is about 628.1324250469.

The spelling of 247829864 in words is "two hundred forty-seven million, eight hundred twenty-nine thousand, eight hundred sixty-four".