68489280 has 112 divisors (see below), whose sum is σ = 241645440. Its totient is φ = 18261504.

The previous prime is 68489273. The next prime is 68489297. The reversal of 68489280 is 8298486.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4677 + ... + 12603.

Almost surely, 2^68489280 is an apocalyptic number.

68489280 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 68489280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120822720).

68489280 is an abundant number, since it is smaller than the sum of its proper divisors (173156160).

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

68489280 is a wasteful number, since it uses less digits than its factorization.

68489280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7953 (or 7937 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 68489280 is about 8275.8250343999. The cubic root of 68489280 is about 409.1421285364.

The spelling of 68489280 in words is "sixty-eight million, four hundred eighty-nine thousand, two hundred eighty".