247426560 has 120 divisors (see below), whose sum is σ = 856987560. Its totient is φ = 65974272.

The previous prime is 247426559. The next prime is 247426567. The reversal of 247426560 is 65624742.

247426560 is a `hidden beast` number, since 2 + 4 + 74 + 26 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×247426560² = 122439805186867200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247426567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17671 + ... + 28409.

It is an arithmetic number, because the mean of its divisors is an integer number (7141563).

Almost surely, 2^247426560 is an apocalyptic number.

247426560 is a gapful number since it is divisible by the number (20) 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 247426560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (428493780).

247426560 is an abundant number, since it is smaller than the sum of its proper divisors (609561000).

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

247426560 is a wasteful number, since it uses less digits than its factorization.

247426560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10768 (or 10749 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 247426560 is about 15729.7984729621. The cubic root of 247426560 is about 627.7915112481.

The spelling of 247426560 in words is "two hundred forty-seven million, four hundred twenty-six thousand, five hundred sixty".