243090452 has 36 divisors (see below), whose sum is σ = 469101108. Its totient is φ = 110140800.

The previous prime is 243090409. The next prime is 243090457. The reversal of 243090452 is 254090342.

It can be written as a sum of positive squares in 2 ways, for example, as 42981136 + 200109316 = 6556^2 + 14146^2 .

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243090457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203168 + ... + 204360.

Almost surely, 2^243090452 is an apocalyptic number.

243090452 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

243090452 is a deficient number, since it is larger than the sum of its proper divisors (226010656).

243090452 is a wasteful number, since it uses less digits than its factorization.

243090452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640 (or 1627 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 243090452 is about 15591.3582474395. The cubic root of 243090452 is about 624.1025643650.

The spelling of 243090452 in words is "two hundred forty-three million, ninety thousand, four hundred fifty-two".