67442420 has 24 divisors (see below), whose sum is σ = 143224200. Its totient is φ = 26673152.

The previous prime is 67442413. The next prime is 67442471. The reversal of 67442420 is 2424476.

It can be written as a sum of positive squares in 4 ways, for example, as 5476 + 67436944 = 74^2 + 8212^2 .

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, 17165 + ... + 20724.

It is an arithmetic number, because the mean of its divisors is an integer number (5967675).

Almost surely, 2^67442420 is an apocalyptic number.

It is an amenable number.

67442420 is an abundant number, since it is smaller than the sum of its proper divisors (75781780).

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

67442420 is a wasteful number, since it uses less digits than its factorization.

67442420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37987 (or 37985 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 67442420 is about 8212.3334077472. Note that the first 3 decimals coincide. The cubic root of 67442420 is about 407.0468346155.

Adding to 67442420 its reverse (2424476), we get a palindrome (69866896).

The spelling of 67442420 in words is "sixty-seven million, four hundred forty-two thousand, four hundred twenty".