68646928 has 40 divisors (see below), whose sum is σ = 152847360. Its totient is φ = 29256960.

The previous prime is 68646923. The next prime is 68646947. The reversal of 68646928 is 82964686.

It is not an unprimeable number, because it can be changed into a prime (68646923) 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, 19788 + ... + 22996.

It is an arithmetic number, because the mean of its divisors is an integer number (3821184).

Almost surely, 2^68646928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68646928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76423680).

68646928 is an abundant number, since it is smaller than the sum of its proper divisors (84200432).

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

68646928 is a wasteful number, since it uses less digits than its factorization.

68646928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3415 (or 3409 counting only the distinct ones).

The product of its digits is 995328, while the sum is 49.

The square root of 68646928 is about 8285.3441690735. The cubic root of 68646928 is about 409.4558078578.

The spelling of 68646928 in words is "sixty-eight million, six hundred forty-six thousand, nine hundred twenty-eight".