67628780 has 24 divisors (see below), whose sum is σ = 142481808. Its totient is φ = 26963648.

The previous prime is 67628777. The next prime is 67628789. The reversal of 67628780 is 8782676.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (67628789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1007 + ... + 11673.

It is an arithmetic number, because the mean of its divisors is an integer number (5936742).

Almost surely, 2^67628780 is an apocalyptic number.

It is an amenable number.

67628780 is an abundant number, since it is smaller than the sum of its proper divisors (74853028).

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

67628780 is a wasteful number, since it uses less digits than its factorization.

67628780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10993 (or 10991 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 67628780 is about 8223.6719292540. The cubic root of 67628780 is about 407.4214133273.

The spelling of 67628780 in words is "sixty-seven million, six hundred twenty-eight thousand, seven hundred eighty".