247403234 has 16 divisors (see below), whose sum is σ = 413433720. Its totient is φ = 110248320.

The previous prime is 247403207. The next prime is 247403243. The reversal of 247403234 is 432304742.

It can be written as a sum of positive squares in 4 ways, for example, as 115498009 + 131905225 = 10747^2 + 11485^2 .

It is a super-2 number, since 2×247403234² = 122416720387317512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 247403197 and 247403206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163307 + ... + 164814.

Almost surely, 2^247403234 is an apocalyptic number.

247403234 is a deficient number, since it is larger than the sum of its proper divisors (166030486).

247403234 is a wasteful number, since it uses less digits than its factorization.

247403234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328165.

The product of its (nonzero) digits is 16128, while the sum is 29.

The square root of 247403234 is about 15729.0569965272. The cubic root of 247403234 is about 627.7717823974.

Adding to 247403234 its reverse (432304742), we get a palindrome (679707976).

The spelling of 247403234 in words is "two hundred forty-seven million, four hundred three thousand, two hundred thirty-four".