68909280 has 192 divisors, whose sum is σ = 245016576. Its totient is φ = 16128000.

The previous prime is 68909273. The next prime is 68909287. The reversal of 68909280 is 8290986.

It is an interprime number because it is at equal distance from previous prime (68909273) and next prime (68909287).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68909287) 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, 163470 + ... + 163890.

It is an arithmetic number, because the mean of its divisors is an integer number (1276128).

Almost surely, 2^68909280 is an apocalyptic number.

68909280 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 68909280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122508288).

68909280 is an abundant number, since it is smaller than the sum of its proper divisors (176107296).

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

68909280 is a wasteful number, since it uses less digits than its factorization.

68909280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 68909280 is about 8301.1613645321. The cubic root of 68909280 is about 409.9767585477.

The spelling of 68909280 in words is "sixty-eight million, nine hundred nine thousand, two hundred eighty".