247238642 has 16 divisors (see below), whose sum is σ = 426648192. Its totient is φ = 105256800.

The previous prime is 247238611. The next prime is 247238653. The reversal of 247238642 is 246832742.

It is a super-2 number, since 2×247238642² = 122253892196008328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247238596 and 247238605.

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, 56363 + ... + 60590.

It is an arithmetic number, because the mean of its divisors is an integer number (26665512).

Almost surely, 2^247238642 is an apocalyptic number.

247238642 is a deficient number, since it is larger than the sum of its proper divisors (179409550).

247238642 is a wasteful number, since it uses less digits than its factorization.

247238642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117113.

The product of its digits is 129024, while the sum is 38.

The square root of 247238642 is about 15723.8240259804. The cubic root of 247238642 is about 627.6325372016.

It can be divided in two parts, 2472 and 38642, that added together give a palindrome (41114).

The spelling of 247238642 in words is "two hundred forty-seven million, two hundred thirty-eight thousand, six hundred forty-two".