67408220 has 48 divisors (see below), whose sum is σ = 155046528. Its totient is φ = 24413760.

The previous prime is 67408207. The next prime is 67408241. The reversal of 67408220 is 2280476.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75899 + ... + 76781.

It is an arithmetic number, because the mean of its divisors is an integer number (3230136).

Almost surely, 2^67408220 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 67408220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77523264).

67408220 is an abundant number, since it is smaller than the sum of its proper divisors (87638308).

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

67408220 is a wasteful number, since it uses less digits than its factorization.

67408220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250 (or 1248 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 67408220 is about 8210.2509096860. The cubic root of 67408220 is about 406.9780186017.

Adding to 67408220 its reverse (2280476), we get a palindrome (69688696).

The spelling of 67408220 in words is "sixty-seven million, four hundred eight thousand, two hundred twenty".