68986680 has 128 divisors (see below), whose sum is σ = 250490880. Its totient is φ = 14837760.

The previous prime is 68986657. The next prime is 68986681. The reversal of 68986680 is 8668986.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68986681) 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, 11865 + ... + 16695.

It is an arithmetic number, because the mean of its divisors is an integer number (1956960).

Almost surely, 2^68986680 is an apocalyptic number.

68986680 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 68986680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125245440).

68986680 is an abundant number, since it is smaller than the sum of its proper divisors (181504200).

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

68986680 is a wasteful number, since it uses less digits than its factorization.

68986680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4869 (or 4865 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 51.

The square root of 68986680 is about 8305.8220544387. The cubic root of 68986680 is about 410.1301985866.

The spelling of 68986680 in words is "sixty-eight million, nine hundred eighty-six thousand, six hundred eighty".