243256490 has 32 divisors (see below), whose sum is σ = 448761600. Its totient is φ = 94895424.

The previous prime is 243256457. The next prime is 243256501. The reversal of 243256490 is 94652342.

It is a self number, because there is not a number n which added to its sum of digits gives 243256490.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163289 + ... + 164771.

It is an arithmetic number, because the mean of its divisors is an integer number (14023800).

Almost surely, 2^243256490 is an apocalyptic number.

243256490 is a deficient number, since it is larger than the sum of its proper divisors (205505110).

243256490 is a wasteful number, since it uses less digits than its factorization.

243256490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 243256490 is about 15596.6820189424. The cubic root of 243256490 is about 624.2446255562.

The spelling of 243256490 in words is "two hundred forty-three million, two hundred fifty-six thousand, four hundred ninety".