68891004 has 144 divisors (see below), whose sum is σ = 227118528. Its totient is φ = 17086464.

The previous prime is 68890999. The next prime is 68891027. The reversal of 68891004 is 40019886.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 68891004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55074 + ... + 56310.

It is an arithmetic number, because the mean of its divisors is an integer number (1577212).

Almost surely, 2^68891004 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 68891004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113559264).

68891004 is an abundant number, since it is smaller than the sum of its proper divisors (158227524).

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

68891004 is a wasteful number, since it uses less digits than its factorization.

68891004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284 (or 1279 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 68891004 is about 8300.0604817073. The cubic root of 68891004 is about 409.9405109008.

The spelling of 68891004 in words is "sixty-eight million, eight hundred ninety-one thousand, four".