243899472 has 40 divisors (see below), whose sum is σ = 640410400. Its totient is φ = 79966080.

The previous prime is 243899437. The next prime is 243899477. The reversal of 243899472 is 274998342.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243899477) 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, 38722 + ... + 44577.

It is an arithmetic number, because the mean of its divisors is an integer number (16010260).

Almost surely, 2^243899472 is an apocalyptic number.

It is an amenable number.

243899472 is an abundant number, since it is smaller than the sum of its proper divisors (396510928).

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

243899472 is a wasteful number, since it uses less digits than its factorization.

243899472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83371 (or 83365 counting only the distinct ones).

The product of its digits is 870912, while the sum is 48.

The square root of 243899472 is about 15617.2811974428. The cubic root of 243899472 is about 624.7941483142.

The spelling of 243899472 in words is "two hundred forty-three million, eight hundred ninety-nine thousand, four hundred seventy-two".