247482540 has 60 divisors (see below), whose sum is σ = 776366976. Its totient is φ = 65994912.

The previous prime is 247482509. The next prime is 247482541. The reversal of 247482540 is 45284742.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×247482540² = 122495215209703200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 247482495 and 247482504.

It is not an unprimeable number, because it can be changed into a prime (247482541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 74764 + ... + 78003.

Almost surely, 2^247482540 is an apocalyptic number.

247482540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247482540 is an abundant number, since it is smaller than the sum of its proper divisors (528884436).

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

247482540 is a wasteful number, since it uses less digits than its factorization.

247482540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152788 (or 152777 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 36.

The square root of 247482540 is about 15731.5777975383. The cubic root of 247482540 is about 627.8388534018.

The spelling of 247482540 in words is "two hundred forty-seven million, four hundred eighty-two thousand, five hundred forty".