67018428 has 96 divisors (see below), whose sum is σ = 180741120. Its totient is φ = 21730032.

The previous prime is 67018423. The next prime is 67018429. The reversal of 67018428 is 82481076.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 67018392 and 67018401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67018423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 411075 + ... + 411237.

It is an arithmetic number, because the mean of its divisors is an integer number (1882720).

It is a vampire number, since it can be written as 7614 ⋅ 8802 (with its own digits).

Almost surely, 2^67018428 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 67018428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90370560).

67018428 is an abundant number, since it is smaller than the sum of its proper divisors (113722692).

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

67018428 is a wasteful number, since it uses less digits than its factorization.

67018428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 67018428 is about 8186.4783637410. The cubic root of 67018428 is about 406.1920435507.

It can be divided in two parts, 6701 and 8428, that added together give a square (15129 = 123²).

The spelling of 67018428 in words is "sixty-seven million, eighteen thousand, four hundred twenty-eight".