247047538 has 8 divisors (see below), whose sum is σ = 390075120. Its totient is φ = 117022500.

The previous prime is 247047533. The next prime is 247047539. The reversal of 247047538 is 835740742.

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

It is a super-2 number, since 2×247047538² = 122064972063722888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 247047538.

It is not an unprimeable number, because it can be changed into a prime (247047533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3250588 + ... + 3250663.

It is an arithmetic number, because the mean of its divisors is an integer number (48759390).

Almost surely, 2^247047538 is an apocalyptic number.

247047538 is a deficient number, since it is larger than the sum of its proper divisors (143027582).

247047538 is a wasteful number, since it uses less digits than its factorization.

247047538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6501272.

The product of its (nonzero) digits is 188160, while the sum is 40.

The square root of 247047538 is about 15717.7459579928. The cubic root of 247047538 is about 627.4707852411.

The spelling of 247047538 in words is "two hundred forty-seven million, forty-seven thousand, five hundred thirty-eight".