68947656 has 32 divisors (see below), whose sum is σ = 181442400. Its totient is φ = 21772800.

The previous prime is 68947651. The next prime is 68947661. The reversal of 68947656 is 65674986.

It is an interprime number because it is at equal distance from previous prime (68947651) and next prime (68947661).

It is a junction number, because it is equal to n+sod(n) for n = 68947599 and 68947608.

It is not an unprimeable number, because it can be changed into a prime (68947651) 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, 75145 + ... + 76056.

It is an arithmetic number, because the mean of its divisors is an integer number (5670075).

Almost surely, 2^68947656 is an apocalyptic number.

It is an amenable number.

68947656 is an abundant number, since it is smaller than the sum of its proper divisors (112494744).

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

68947656 is a wasteful number, since it uses less digits than its factorization.

68947656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151229 (or 151225 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 51.

The square root of 68947656 is about 8303.4725265999. The cubic root of 68947656 is about 410.0528506132.

The spelling of 68947656 in words is "sixty-eight million, nine hundred forty-seven thousand, six hundred fifty-six".