68721480 has 256 divisors, whose sum is σ = 256608000. Its totient is φ = 16257024.

The previous prime is 68721467. The next prime is 68721481. The reversal of 68721480 is 8412786.

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

It is not an unprimeable number, because it can be changed into a prime (68721481) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 348742 + ... + 348938.

It is an arithmetic number, because the mean of its divisors is an integer number (1002375).

Almost surely, 2^68721480 is an apocalyptic number.

68721480 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 68721480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128304000).

68721480 is an abundant number, since it is smaller than the sum of its proper divisors (187886520).

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

68721480 is a wasteful number, since it uses less digits than its factorization.

68721480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 68721480 is about 8289.8419767810. The cubic root of 68721480 is about 409.6039800893.

The spelling of 68721480 in words is "sixty-eight million, seven hundred twenty-one thousand, four hundred eighty".