243777248 has 144 divisors (see below), whose sum is σ = 591222240. Its totient is φ = 98165760.

The previous prime is 243777221. The next prime is 243777257. The reversal of 243777248 is 842777342.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 243777199 and 243777208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1459661 + ... + 1459827.

It is an arithmetic number, because the mean of its divisors is an integer number (4105710).

Almost surely, 2^243777248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243777248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295611120).

243777248 is an abundant number, since it is smaller than the sum of its proper divisors (347444992).

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

243777248 is a wasteful number, since it uses less digits than its factorization.

243777248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 222 counting only the distinct ones).

The product of its digits is 526848, while the sum is 44.

The square root of 243777248 is about 15613.3676059971. The cubic root of 243777248 is about 624.6897643249.

The spelling of 243777248 in words is "two hundred forty-three million, seven hundred seventy-seven thousand, two hundred forty-eight".