243420040404 has 60 divisors (see below), whose sum is σ = 636932263968. Its totient is φ = 81065523600.

The previous prime is 243420040399. The next prime is 243420040417. The reversal of 243420040404 is 404040024342.

It is a happy number.

243420040404 is a `hidden beast` number, since 24 + 34 + 200 + 4 + 0 + 404 = 666.

It is a super-3 number, since 3×243420040404³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9169 + ... + 697799.

Almost surely, 2^243420040404 is an apocalyptic number.

It is an amenable number.

243420040404 is an abundant number, since it is smaller than the sum of its proper divisors (393512223564).

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

243420040404 is a wasteful number, since it uses less digits than its factorization.

243420040404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689738 (or 689727 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

Adding to 243420040404 its reverse (404040024342), we get a palindrome (647460064746).

The spelling of 243420040404 in words is "two hundred forty-three billion, four hundred twenty million, forty thousand, four hundred four".