247239480 has 64 divisors (see below), whose sum is σ = 748323360. Its totient is φ = 65343488.

The previous prime is 247239467. The next prime is 247239497. The reversal of 247239480 is 84932742.

It is a super-2 number, since 2×247239480² = 122254720941340800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4444 + ... + 22676.

Almost surely, 2^247239480 is an apocalyptic number.

247239480 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 247239480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (374161680).

247239480 is an abundant number, since it is smaller than the sum of its proper divisors (501083880).

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

247239480 is a wasteful number, since it uses less digits than its factorization.

247239480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18360 (or 18356 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 247239480 is about 15723.8506734197. The cubic root of 247239480 is about 627.6332463080.

The spelling of 247239480 in words is "two hundred forty-seven million, two hundred thirty-nine thousand, four hundred eighty".