67284438 has 32 divisors (see below), whose sum is σ = 146430816. Its totient is φ = 20487168.

The previous prime is 67284433. The next prime is 67284439. The reversal of 67284438 is 83448276.

It is a self number, because there is not a number n which added to its sum of digits gives 67284438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67284433) 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, 3120 + ... + 12012.

It is an arithmetic number, because the mean of its divisors is an integer number (4575963).

Almost surely, 2^67284438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67284438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73215408).

67284438 is an abundant number, since it is smaller than the sum of its proper divisors (79146378).

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

67284438 is a wasteful number, since it uses less digits than its factorization.

67284438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9008.

The product of its digits is 258048, while the sum is 42.

The square root of 67284438 is about 8202.7091866041. The cubic root of 67284438 is about 406.7287541442.

The spelling of 67284438 in words is "sixty-seven million, two hundred eighty-four thousand, four hundred thirty-eight".