247743040 has 56 divisors (see below), whose sum is σ = 624654072. Its totient is φ = 93265920.

The previous prime is 247743037. The next prime is 247743043. The reversal of 247743040 is 40347742.

It is an interprime number because it is at equal distance from previous prime (247743037) and next prime (247743043).

It can be written as a sum of positive squares in 4 ways, for example, as 11075584 + 236667456 = 3328^2 + 15384^2 .

It is a super-2 number, since 2×247743040² = 122753227736883200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247742993 and 247743011.

It is not an unprimeable number, because it can be changed into a prime (247743043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17331 + ... + 28210.

It is an arithmetic number, because the mean of its divisors is an integer number (11154537).

Almost surely, 2^247743040 is an apocalyptic number.

247743040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247743040 is an abundant number, since it is smaller than the sum of its proper divisors (376911032).

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

247743040 is a wasteful number, since it uses less digits than its factorization.

247743040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45575 (or 45565 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 31.

The square root of 247743040 is about 15739.8551454580. The cubic root of 247743040 is about 628.0590637783.

The spelling of 247743040 in words is "two hundred forty-seven million, seven hundred forty-three thousand, forty".