42668431 has 16 divisors (see below), whose sum is σ = 47738880. Its totient is φ = 37870560.

The previous prime is 42668411. The next prime is 42668441. The reversal of 42668431 is 13486624.

It is not a de Polignac number, because 42668431 - 2⁵ = 42668399 is a prime.

It is a super-2 number, since 2×42668431² = 3641190008003522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42668411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96096 + ... + 96538.

It is an arithmetic number, because the mean of its divisors is an integer number (2983680).

Almost surely, 2^42668431 is an apocalyptic number.

42668431 is a deficient number, since it is larger than the sum of its proper divisors (5070449).

42668431 is a wasteful number, since it uses less digits than its factorization.

42668431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726.

The product of its digits is 27648, while the sum is 34.

The square root of 42668431 is about 6532.1076996633. The cubic root of 42668431 is about 349.4370023504.

The spelling of 42668431 in words is "forty-two million, six hundred sixty-eight thousand, four hundred thirty-one".