42423231440 has 20 divisors (see below), whose sum is σ = 98634013284. Its totient is φ = 16969292544.

The previous prime is 42423231427. The next prime is 42423231467. The reversal of 42423231440 is 4413232424.

It can be written as a sum of positive squares in 2 ways, for example, as 32679962176 + 9743269264 = 180776^2 + 98708^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 265145117 + ... + 265145276.

Almost surely, 2^42423231440 is an apocalyptic number.

42423231440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42423231440 is an abundant number, since it is smaller than the sum of its proper divisors (56210781844).

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

42423231440 is a wasteful number, since it uses less digits than its factorization.

42423231440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530290406 (or 530290400 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 42423231440 its reverse (4413232424), we get a palindrome (46836463864).

The spelling of 42423231440 in words is "forty-two billion, four hundred twenty-three million, two hundred thirty-one thousand, four hundred forty".