247123280 has 40 divisors (see below), whose sum is σ = 575832192. Its totient is φ = 98630784.

The previous prime is 247123273. The next prime is 247123343. The reversal of 247123280 is 82321742.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×247123280² = 122139831035916800, 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 7 ways as a sum of consecutive naturals, for example, 35789 + ... + 42131.

Almost surely, 2^247123280 is an apocalyptic number.

247123280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247123280 is an abundant number, since it is smaller than the sum of its proper divisors (328708912).

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

247123280 is a wasteful number, since it uses less digits than its factorization.

247123280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6843 (or 6837 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 247123280 is about 15720.1552155187. The cubic root of 247123280 is about 627.5349038536.

The spelling of 247123280 in words is "two hundred forty-seven million, one hundred twenty-three thousand, two hundred eighty".