68618934 has 64 divisors (see below), whose sum is σ = 158976000. Its totient is φ = 21915360.

The previous prime is 68618933. The next prime is 68618969. The reversal of 68618934 is 43981686.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 68618934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68618933) 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, 299532 + ... + 299760.

It is an arithmetic number, because the mean of its divisors is an integer number (2484000).

Almost surely, 2^68618934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68618934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79488000).

68618934 is an abundant number, since it is smaller than the sum of its proper divisors (90357066).

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

68618934 is a wasteful number, since it uses less digits than its factorization.

68618934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 444 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 68618934 is about 8283.6546282423. The cubic root of 68618934 is about 409.4001420295.

The spelling of 68618934 in words is "sixty-eight million, six hundred eighteen thousand, nine hundred thirty-four".