247700064 has 96 divisors (see below), whose sum is σ = 718502400. Its totient is φ = 74319872.

The previous prime is 247700053. The next prime is 247700071. The reversal of 247700064 is 460007742.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×247700064² = 122710643411208192, 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 15 ways as a sum of consecutive naturals, for example, 34237 + ... + 40835.

It is an arithmetic number, because the mean of its divisors is an integer number (7484400).

Almost surely, 2^247700064 is an apocalyptic number.

247700064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247700064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359251200).

247700064 is an abundant number, since it is smaller than the sum of its proper divisors (470802336).

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

247700064 is a wasteful number, since it uses less digits than its factorization.

247700064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6652 (or 6644 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 247700064 is about 15738.4898894398. The cubic root of 247700064 is about 628.0227451970.

The spelling of 247700064 in words is "two hundred forty-seven million, seven hundred thousand, sixty-four".