243959346438 has 32 divisors (see below), whose sum is σ = 535929004800. Its totient is φ = 73690236576.

The previous prime is 243959346431. The next prime is 243959346467. The reversal of 243959346438 is 834643959342.

It is a super-2 number, since 2×243959346438² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243959346431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46518993 + ... + 46524236.

It is an arithmetic number, because the mean of its divisors is an integer number (16747781400).

Almost surely, 2^243959346438 is an apocalyptic number.

243959346438 is an abundant number, since it is smaller than the sum of its proper divisors (291969658362).

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

243959346438 is a wasteful number, since it uses less digits than its factorization.

243959346438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93043276.

The product of its digits is 67184640, while the sum is 60.

The spelling of 243959346438 in words is "two hundred forty-three billion, nine hundred fifty-nine million, three hundred forty-six thousand, four hundred thirty-eight".