247631064 has 32 divisors (see below), whose sum is σ = 645995520. Its totient is φ = 78954656.

The previous prime is 247631057. The next prime is 247631101. The reversal of 247631064 is 460136742.

It is a happy number.

It is a super-2 number, since 2×247631064² = 122642287715544192, 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223752 + ... + 224855.

It is an arithmetic number, because the mean of its divisors is an integer number (20187360).

Almost surely, 2^247631064 is an apocalyptic number.

247631064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

247631064 is an abundant number, since it is smaller than the sum of its proper divisors (398364456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

247631064 is a wasteful number, since it uses less digits than its factorization.

247631064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448639 (or 448635 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 247631064 is about 15736.2976585981. The cubic root of 247631064 is about 627.9644252097.

The spelling of 247631064 in words is "two hundred forty-seven million, six hundred thirty-one thousand, sixty-four".