68287320 has 128 divisors (see below), whose sum is σ = 232113600. Its totient is φ = 17851392.

The previous prime is 68287313. The next prime is 68287333. The reversal of 68287320 is 2378286.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56644 + ... + 57836.

Almost surely, 2^68287320 is an apocalyptic number.

68287320 is a gapful number since it is divisible by the number (60) 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 68287320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116056800).

68287320 is an abundant number, since it is smaller than the sum of its proper divisors (163826280).

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

68287320 is a wasteful number, since it uses less digits than its factorization.

68287320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266 (or 1256 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 68287320 is about 8263.6142213925. The cubic root of 68287320 is about 408.7395755274.

The spelling of 68287320 in words is "sixty-eight million, two hundred eighty-seven thousand, three hundred twenty".