243471780 has 72 divisors (see below), whose sum is σ = 748972224. Its totient is φ = 64008000.

The previous prime is 243471713. The next prime is 243471821. The reversal of 243471780 is 87174342.

It is a happy number.

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

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, 3255 + ... + 22305.

It is an arithmetic number, because the mean of its divisors is an integer number (10402392).

Almost surely, 2^243471780 is an apocalyptic number.

243471780 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 243471780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (374486112).

243471780 is an abundant number, since it is smaller than the sum of its proper divisors (505500444).

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

243471780 is a wasteful number, since it uses less digits than its factorization.

243471780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19137 (or 19132 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 243471780 is about 15603.5822810020. The cubic root of 243471780 is about 624.4287302672.

The spelling of 243471780 in words is "two hundred forty-three million, four hundred seventy-one thousand, seven hundred eighty".