247400000 has 84 divisors (see below), whose sum is σ = 614124756. Its totient is φ = 98880000.

The previous prime is 247399981. The next prime is 247400003. The reversal of 247400000 is 4742.

It can be written as a sum of positive squares in 6 ways, for example, as 176570944 + 70829056 = 13288^2 + 8416^2 .

It is a super-2 number, since 2×247400000² = 122413520000000000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247400003) 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 11 ways as a sum of consecutive naturals, for example, 199382 + ... + 200618.

It is an arithmetic number, because the mean of its divisors is an integer number (7311009).

Almost surely, 2^247400000 is an apocalyptic number.

247400000 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 247400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307062378).

247400000 is an abundant number, since it is smaller than the sum of its proper divisors (366724756).

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

247400000 is an frugal number, since it uses more digits than its factorization.

247400000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274 (or 1244 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 247400000 is about 15728.9541928254. The cubic root of 247400000 is about 627.7690470211.

Adding to 247400000 its reverse (4742), we get a palindrome (247404742).

The spelling of 247400000 in words is "two hundred forty-seven million, four hundred thousand".