247132540 has 48 divisors (see below), whose sum is σ = 533191680. Its totient is φ = 96183360.

The previous prime is 247132537. The next prime is 247132541. The reversal of 247132540 is 45231742.

It is a super-3 number, since 3×247132540³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 247132499 and 247132508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247132541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111079 + ... + 113281.

It is an arithmetic number, because the mean of its divisors is an integer number (11108160).

Almost surely, 2^247132540 is an apocalyptic number.

247132540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247132540 is an abundant number, since it is smaller than the sum of its proper divisors (286059140).

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

247132540 is a wasteful number, since it uses less digits than its factorization.

247132540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362 (or 2360 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 247132540 is about 15720.4497391137. The cubic root of 247132540 is about 627.5427419127.

The spelling of 247132540 in words is "two hundred forty-seven million, one hundred thirty-two thousand, five hundred forty".