68990736 has 80 divisors (see below), whose sum is σ = 185773824. Its totient is φ = 22044672.

The previous prime is 68990723. The next prime is 68990737. The reversal of 68990736 is 63709986.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68990737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119280 + ... + 119856.

Almost surely, 2^68990736 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 68990736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92886912).

68990736 is an abundant number, since it is smaller than the sum of its proper divisors (116783088).

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

68990736 is a wasteful number, since it uses less digits than its factorization.

68990736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 682 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 68990736 is about 8306.0662169284. The cubic root of 68990736 is about 410.1382361551.

The spelling of 68990736 in words is "sixty-eight million, nine hundred ninety thousand, seven hundred thirty-six".