247580280 has 128 divisors (see below), whose sum is σ = 861235200. Its totient is φ = 63144576.

The previous prime is 247580237. The next prime is 247580287. The reversal of 247580280 is 82085742.

It is a happy number.

247580280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×247580280² = 122591990089756800, 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 (247580287) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19857 + ... + 29823.

It is an arithmetic number, because the mean of its divisors is an integer number (6728400).

Almost surely, 2^247580280 is an apocalyptic number.

247580280 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 247580280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (430617600).

247580280 is an abundant number, since it is smaller than the sum of its proper divisors (613654920).

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

247580280 is a wasteful number, since it uses less digits than its factorization.

247580280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010 (or 10000 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 247580280 is about 15734.6839815740. The cubic root of 247580280 is about 627.9214947777.

The spelling of 247580280 in words is "two hundred forty-seven million, five hundred eighty thousand, two hundred eighty".