68421980 has 24 divisors (see below), whose sum is σ = 156749040. Its totient is φ = 24880640.

The previous prime is 68421967. The next prime is 68422031. The reversal of 68421980 is 8912486.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155285 + ... + 155724.

It is an arithmetic number, because the mean of its divisors is an integer number (6531210).

Almost surely, 2^68421980 is an apocalyptic number.

It is an amenable number.

68421980 is an abundant number, since it is smaller than the sum of its proper divisors (88327060).

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

68421980 is a wasteful number, since it uses less digits than its factorization.

68421980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311029 (or 311027 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 68421980 is about 8271.7579751828. The cubic root of 68421980 is about 409.0080720864.

The spelling of 68421980 in words is "sixty-eight million, four hundred twenty-one thousand, nine hundred eighty".