247503940 has 24 divisors (see below), whose sum is σ = 520110360. Its totient is φ = 98934528.

The previous prime is 247503931. The next prime is 247503967. The reversal of 247503940 is 49305742.

It can be written as a sum of positive squares in 4 ways, for example, as 15429184 + 232074756 = 3928^2 + 15234^2 .

It is a super-2 number, since 2×247503940² = 122516400631047200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247503896 and 247503905.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 35026 + ... + 41494.

It is an arithmetic number, because the mean of its divisors is an integer number (21671265).

Almost surely, 2^247503940 is an apocalyptic number.

247503940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247503940 is an abundant number, since it is smaller than the sum of its proper divisors (272606420).

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

247503940 is a wasteful number, since it uses less digits than its factorization.

247503940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8391 (or 8389 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 247503940 is about 15732.2579434740. The cubic root of 247503940 is about 627.8569494450.

The spelling of 247503940 in words is "two hundred forty-seven million, five hundred three thousand, nine hundred forty".