247399560 has 96 divisors (see below), whose sum is σ = 814320000. Its totient is φ = 65130624.

The previous prime is 247399547. The next prime is 247399573. The reversal of 247399560 is 65993742.

It is a happy number.

247399560 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (247399547) and next prime (247399573).

It is a super-2 number, since 2×247399560² = 122413084576387200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 23 ways as a sum of consecutive naturals, for example, 24091 + ... + 32789.

It is an arithmetic number, because the mean of its divisors is an integer number (8482500).

Almost surely, 2^247399560 is an apocalyptic number.

247399560 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 247399560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407160000).

247399560 is an abundant number, since it is smaller than the sum of its proper divisors (566920440).

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

247399560 is a wasteful number, since it uses less digits than its factorization.

247399560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8795 (or 8788 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 247399560 is about 15728.9402058753. The cubic root of 247399560 is about 627.7686748592.

The spelling of 247399560 in words is "two hundred forty-seven million, three hundred ninety-nine thousand, five hundred sixty".