247863740 has 144 divisors (see below), whose sum is σ = 607565280. Its totient is φ = 84602880.

The previous prime is 247863731. The next prime is 247863743. The reversal of 247863740 is 47368742.

It is a super-2 number, since 2×247863740² = 122872867213575200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247863743) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4063310 + ... + 4063370.

Almost surely, 2^247863740 is an apocalyptic number.

247863740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247863740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303782640).

247863740 is an abundant number, since it is smaller than the sum of its proper divisors (359701540).

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

247863740 is a wasteful number, since it uses less digits than its factorization.

247863740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 41.

The square root of 247863740 is about 15743.6888942840. The cubic root of 247863740 is about 628.1610436649.

The spelling of 247863740 in words is "two hundred forty-seven million, eight hundred sixty-three thousand, seven hundred forty".