243420440434 has 16 divisors (see below), whose sum is σ = 372212931168. Its totient is φ = 119365468992.

The previous prime is 243420440423. The next prime is 243420440467. The reversal of 243420440434 is 434044024342.

It is a self number, because there is not a number n which added to its sum of digits gives 243420440434.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3970839 + ... + 4031674.

It is an arithmetic number, because the mean of its divisors is an integer number (23263308198).

Almost surely, 2^243420440434 is an apocalyptic number.

243420440434 is a deficient number, since it is larger than the sum of its proper divisors (128792490734).

243420440434 is a wasteful number, since it uses less digits than its factorization.

243420440434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8002809.

The product of its (nonzero) digits is 147456, while the sum is 34.

Adding to 243420440434 its reverse (434044024342), we get a palindrome (677464464776).

The spelling of 243420440434 in words is "two hundred forty-three billion, four hundred twenty million, four hundred forty thousand, four hundred thirty-four".