247453273728 has 640 divisors, whose sum is σ = 802842163200. Its totient is φ = 75403560960.

The previous prime is 247453273723. The next prime is 247453273733. The reversal of 247453273728 is 827372354742.

247453273728 is a `hidden beast` number, since 2 + 4 + 74 + 532 + 7 + 37 + 2 + 8 = 666.

247453273728 is digitally balanced in base 2, 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 (247453273723) and next prime (247453273733).

It is a super-2 number, since 2×247453273728² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (247453273723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1109655825 + ... + 1109656047.

It is an arithmetic number, because the mean of its divisors is an integer number (1254440880).

Almost surely, 2^247453273728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247453273728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401421081600).

247453273728 is an abundant number, since it is smaller than the sum of its proper divisors (555388889472).

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

247453273728 is a wasteful number, since it uses less digits than its factorization.

247453273728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 421 counting only the distinct ones).

The product of its digits is 15805440, while the sum is 54.

The spelling of 247453273728 in words is "two hundred forty-seven billion, four hundred fifty-three million, two hundred seventy-three thousand, seven hundred twenty-eight".