68521980 has 48 divisors (see below), whose sum is σ = 201962880. Its totient is φ = 17310528.

The previous prime is 68521967. The next prime is 68522009. The reversal of 68521980 is 8912586.

It is a congruent number.

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, 28914 + ... + 31193.

It is an arithmetic number, because the mean of its divisors is an integer number (4207560).

Almost surely, 2^68521980 is an apocalyptic number.

68521980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68521980 is an abundant number, since it is smaller than the sum of its proper divisors (133440900).

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

68521980 is a wasteful number, since it uses less digits than its factorization.

68521980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60138 (or 60136 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 68521980 is about 8277.8004324820. The cubic root of 68521980 is about 409.2072327343.

The spelling of 68521980 in words is "sixty-eight million, five hundred twenty-one thousand, nine hundred eighty".