42667776 has 72 divisors (see below), whose sum is σ = 126196560. Its totient is φ = 14220288.

The previous prime is 42667759. The next prime is 42667777. The reversal of 42667776 is 67776624.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42667777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3826 + ... + 9998.

It is an arithmetic number, because the mean of its divisors is an integer number (1752730).

Almost surely, 2^42667776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42667776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63098280).

42667776 is an abundant number, since it is smaller than the sum of its proper divisors (83528784).

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

42667776 is an equidigital number, since it uses as much as digits as its factorization.

42667776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6198 (or 6178 counting only the distinct ones).

The product of its digits is 592704, while the sum is 45.

The square root of 42667776 is about 6532.0575625143. The cubic root of 42667776 is about 349.4352142806.

The spelling of 42667776 in words is "forty-two million, six hundred sixty-seven thousand, seven hundred seventy-six".