67442864 has 40 divisors (see below), whose sum is σ = 136062720. Its totient is φ = 32345600.

The previous prime is 67442863. The next prime is 67442867. The reversal of 67442864 is 46824476.

It is not an unprimeable number, because it can be changed into a prime (67442863) 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, 88244 + ... + 89004.

It is an arithmetic number, because the mean of its divisors is an integer number (3401568).

Almost surely, 2^67442864 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 67442864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68031360).

67442864 is an abundant number, since it is smaller than the sum of its proper divisors (68619856).

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

67442864 is a wasteful number, since it uses less digits than its factorization.

67442864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989 (or 983 counting only the distinct ones).

The product of its digits is 258048, while the sum is 41.

The square root of 67442864 is about 8212.3604402145. The cubic root of 67442864 is about 407.0477278634.

The spelling of 67442864 in words is "sixty-seven million, four hundred forty-two thousand, eight hundred sixty-four".