247138080 has 96 divisors (see below), whose sum is σ = 889709184. Its totient is φ = 56487936.

The previous prime is 247138057. The next prime is 247138081. The reversal of 247138080 is 80831742.

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

It is a super-2 number, since 2×247138080² = 122154461172172800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247138081) by changing a digit.

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, 33417 + ... + 40136.

It is an arithmetic number, because the mean of its divisors is an integer number (9267804).

Almost surely, 2^247138080 is an apocalyptic number.

247138080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247138080 is an abundant number, since it is smaller than the sum of its proper divisors (642571104).

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

247138080 is a wasteful number, since it uses less digits than its factorization.

247138080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73578 (or 73570 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 247138080 is about 15720.6259417365. The cubic root of 247138080 is about 627.5474311115.

The spelling of 247138080 in words is "two hundred forty-seven million, one hundred thirty-eight thousand, eighty".