67730256 has 100 divisors (see below), whose sum is σ = 213897024. Its totient is φ = 20520000.

The previous prime is 67730219. The next prime is 67730263. The reversal of 67730256 is 65203776.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 67730256.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11881 + ... + 16631.

Almost surely, 2^67730256 is an apocalyptic number.

67730256 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67730256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106948512).

67730256 is an abundant number, since it is smaller than the sum of its proper divisors (146166768).

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

67730256 is a wasteful number, since it uses less digits than its factorization.

67730256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4782 (or 4767 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 36.

The square root of 67730256 is about 8229.8393665976. The cubic root of 67730256 is about 407.6250881243.

The spelling of 67730256 in words is "sixty-seven million, seven hundred thirty thousand, two hundred fifty-six".