68955864 has 128 divisors (see below), whose sum is σ = 192249600. Its totient is φ = 20528640.

The previous prime is 68955841. The next prime is 68955869. The reversal of 68955864 is 46855986.

It is a super-2 number, since 2×68955864² = 9509822359972992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68955869) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1029159 + ... + 1029225.

It is an arithmetic number, because the mean of its divisors is an integer number (1501950).

Almost surely, 2^68955864 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 68955864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96124800).

68955864 is an abundant number, since it is smaller than the sum of its proper divisors (123293736).

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

68955864 is a wasteful number, since it uses less digits than its factorization.

68955864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 189 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 51.

The square root of 68955864 is about 8303.9667629393. The cubic root of 68955864 is about 410.0691217984.

The spelling of 68955864 in words is "sixty-eight million, nine hundred fifty-five thousand, eight hundred sixty-four".