67004406 has 96 divisors (see below), whose sum is σ = 172972800. Its totient is φ = 18349632.

The previous prime is 67004387. The next prime is 67004407. The reversal of 67004406 is 60440076.

It is a self number, because there is not a number n which added to its sum of digits gives 67004406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67004407) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 449620 + ... + 449768.

It is an arithmetic number, because the mean of its divisors is an integer number (1801800).

Almost surely, 2^67004406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67004406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86486400).

67004406 is an abundant number, since it is smaller than the sum of its proper divisors (105968394).

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

67004406 is a wasteful number, since it uses less digits than its factorization.

67004406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 67004406 is about 8185.6219067338. The cubic root of 67004406 is about 406.1637129245.

The spelling of 67004406 in words is "sixty-seven million, four thousand, four hundred six".