247855838 has 8 divisors (see below), whose sum is σ = 374279400. Its totient is φ = 123096040.

The previous prime is 247855807. The next prime is 247855841. The reversal of 247855838 is 838558742.

It is a happy number.

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

It is a super-2 number, since 2×247855838² = 122865032861364488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415568 + ... + 416163.

It is an arithmetic number, because the mean of its divisors is an integer number (46784925).

Almost surely, 2^247855838 is an apocalyptic number.

247855838 is a deficient number, since it is larger than the sum of its proper divisors (126423562).

247855838 is a wasteful number, since it uses less digits than its factorization.

247855838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831882.

The product of its digits is 2150400, while the sum is 50.

The square root of 247855838 is about 15743.4379345809. The cubic root of 247855838 is about 628.1543682481.

The spelling of 247855838 in words is "two hundred forty-seven million, eight hundred fifty-five thousand, eight hundred thirty-eight".