42168440 has 32 divisors (see below), whose sum is σ = 95256000. Its totient is φ = 16800384.

The previous prime is 42168437. The next prime is 42168457. The reversal of 42168440 is 4486124.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8801 + ... + 12719.

It is an arithmetic number, because the mean of its divisors is an integer number (2976750).

Almost surely, 2^42168440 is an apocalyptic number.

42168440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42168440 is an abundant number, since it is smaller than the sum of its proper divisors (53087560).

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

42168440 is a wasteful number, since it uses less digits than its factorization.

42168440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4199 (or 4195 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 42168440 is about 6493.7231231398. The cubic root of 42168440 is about 348.0667287374.

The spelling of 42168440 in words is "forty-two million, one hundred sixty-eight thousand, four hundred forty".