68981004 has 48 divisors (see below), whose sum is σ = 179555040. Its totient is φ = 22901760.

The previous prime is 68980993. The next prime is 68981009. The reversal of 68981004 is 40018986.

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 68981004.

It is not an unprimeable number, because it can be changed into a prime (68981009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29212 + ... + 31484.

It is an arithmetic number, because the mean of its divisors is an integer number (3740730).

Almost surely, 2^68981004 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 68981004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89777520).

68981004 is an abundant number, since it is smaller than the sum of its proper divisors (110574036).

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

68981004 is a wasteful number, since it uses less digits than its factorization.

68981004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2567 (or 2559 counting only the distinct ones).

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

The square root of 68981004 is about 8305.4803593772. The cubic root of 68981004 is about 410.1189502178.

The spelling of 68981004 in words is "sixty-eight million, nine hundred eighty-one thousand, four".