247407985 has 16 divisors (see below), whose sum is σ = 327525120. Its totient is φ = 177907840.

The previous prime is 247407983. The next prime is 247407991. The reversal of 247407985 is 589704742.

It is not a de Polignac number, because 247407985 - 2¹ = 247407983 is a prime.

It is a super-2 number, since 2×247407985² = 122421422083520450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247407983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20377 + ... + 30166.

It is an arithmetic number, because the mean of its divisors is an integer number (20470320).

Almost surely, 2^247407985 is an apocalyptic number.

It is an amenable number.

247407985 is a deficient number, since it is larger than the sum of its proper divisors (80117135).

247407985 is a wasteful number, since it uses less digits than its factorization.

247407985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50648.

The product of its (nonzero) digits is 564480, while the sum is 46.

The square root of 247407985 is about 15729.2080220207. The cubic root of 247407985 is about 627.7758008367.

The spelling of 247407985 in words is "two hundred forty-seven million, four hundred seven thousand, nine hundred eighty-five".