67442240 has 56 divisors (see below), whose sum is σ = 161300160. Its totient is φ = 26859008.

The previous prime is 67442239. The next prime is 67442293. The reversal of 67442240 is 4224476.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133829 + ... + 134331.

It is an arithmetic number, because the mean of its divisors is an integer number (2880360).

Almost surely, 2^67442240 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 67442240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80650080).

67442240 is an abundant number, since it is smaller than the sum of its proper divisors (93857920).

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

67442240 is a wasteful number, since it uses less digits than its factorization.

67442240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939 (or 929 counting only the distinct ones).

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

The square root of 67442240 is about 8212.3224486134. The cubic root of 67442240 is about 407.0464724868.

The spelling of 67442240 in words is "sixty-seven million, four hundred forty-two thousand, two hundred forty".