67889920 has 72 divisors (see below), whose sum is σ = 185873184. Its totient is φ = 23273472.

The previous prime is 67889903. The next prime is 67889971. The reversal of 67889920 is 2998876.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5172 + ... + 12748.

It is an arithmetic number, because the mean of its divisors is an integer number (2581572).

Almost surely, 2^67889920 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 67889920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92936592).

67889920 is an abundant number, since it is smaller than the sum of its proper divisors (117983264).

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

67889920 is an equidigital number, since it uses as much as digits as its factorization.

67889920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7605 (or 7591 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 67889920 is about 8239.5339674037. The cubic root of 67889920 is about 407.9451419259.

The spelling of 67889920 in words is "sixty-seven million, eight hundred eighty-nine thousand, nine hundred twenty".