68249280 has 224 divisors, whose sum is σ = 247546368. Its totient is φ = 15769600.

The previous prime is 68249263. The next prime is 68249287. The reversal of 68249280 is 8294286.

It is not an unprimeable number, because it can be changed into a prime (68249287) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242740 + ... + 243020.

Almost surely, 2^68249280 is an apocalyptic number.

68249280 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 68249280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123773184).

68249280 is an abundant number, since it is smaller than the sum of its proper divisors (179297088).

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

68249280 is a wasteful number, since it uses less digits than its factorization.

68249280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 68249280 is about 8261.3122444319. The cubic root of 68249280 is about 408.6636642090.

The spelling of 68249280 in words is "sixty-eight million, two hundred forty-nine thousand, two hundred eighty".