68929940 has 24 divisors (see below), whose sum is σ = 145162752. Its totient is φ = 27493920.

The previous prime is 68929921. The next prime is 68929963. The reversal of 68929940 is 4992986.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

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, 2645 + ... + 12035.

It is an arithmetic number, because the mean of its divisors is an integer number (6048448).

Almost surely, 2^68929940 is an apocalyptic number.

It is an amenable number.

68929940 is an abundant number, since it is smaller than the sum of its proper divisors (76232812).

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

68929940 is a wasteful number, since it uses less digits than its factorization.

68929940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9767 (or 9765 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 68929940 is about 8302.4056754654. The cubic root of 68929940 is about 410.0177267767.

The spelling of 68929940 in words is "sixty-eight million, nine hundred twenty-nine thousand, nine hundred forty".