68889744 has 320 divisors, whose sum is σ = 261888000. Its totient is φ = 16796160.

The previous prime is 68889739. The next prime is 68889749. The reversal of 68889744 is 44798886.

It is an interprime number because it is at equal distance from previous prime (68889739) and next prime (68889749).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68889749) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 631962 + ... + 632070.

It is an arithmetic number, because the mean of its divisors is an integer number (818400).

Almost surely, 2^68889744 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 68889744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130944000).

68889744 is an abundant number, since it is smaller than the sum of its proper divisors (192998256).

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

68889744 is a wasteful number, since it uses less digits than its factorization.

68889744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 151 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The square root of 68889744 is about 8299.9845782989. The cubic root of 68889744 is about 409.9380116476.

The spelling of 68889744 in words is "sixty-eight million, eight hundred eighty-nine thousand, seven hundred forty-four".