243140428 has 12 divisors (see below), whose sum is σ = 427956480. Its totient is φ = 120867152.

The previous prime is 243140419. The next prime is 243140441. The reversal of 243140428 is 824041342.

It is a happy number.

It is a super-3 number, since 3×243140428³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243140396 and 243140405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174988 + ... + 176371.

It is an arithmetic number, because the mean of its divisors is an integer number (35663040).

Almost surely, 2^243140428 is an apocalyptic number.

It is an amenable number.

243140428 is a deficient number, since it is larger than the sum of its proper divisors (184816052).

243140428 is a wasteful number, since it uses less digits than its factorization.

243140428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351536 (or 351534 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 243140428 is about 15592.9608477672. The cubic root of 243140428 is about 624.1453303564.

The spelling of 243140428 in words is "two hundred forty-three million, one hundred forty thousand, four hundred twenty-eight".