68816790 has 160 divisors (see below), whose sum is σ = 216406080. Its totient is φ = 15365376.

The previous prime is 68816779. The next prime is 68816801. The reversal of 68816790 is 9761886.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (68816779) and next prime (68816801).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 300396 + ... + 300624.

It is an arithmetic number, because the mean of its divisors is an integer number (1352538).

Almost surely, 2^68816790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68816790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108203040).

68816790 is an abundant number, since it is smaller than the sum of its proper divisors (147589290).

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

68816790 is a wasteful number, since it uses less digits than its factorization.

68816790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 68816790 is about 8295.5885867128. The cubic root of 68816790 is about 409.7932528917.

The spelling of 68816790 in words is "sixty-eight million, eight hundred sixteen thousand, seven hundred ninety".