68228090 has 24 divisors (see below), whose sum is σ = 142862292. Its totient is φ = 23392320.

The previous prime is 68228081. The next prime is 68228093. The reversal of 68228090 is 9082286.

It can be written as a sum of positive squares in 2 ways, for example, as 65141041 + 3087049 = 8071^2 + 1757^2 .

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 68228090.

It is not an unprimeable number, because it can be changed into a prime (68228093) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69131 + ... + 70110.

Almost surely, 2^68228090 is an apocalyptic number.

68228090 is an abundant number, since it is smaller than the sum of its proper divisors (74634202).

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

68228090 is a wasteful number, since it uses less digits than its factorization.

68228090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139262 (or 139255 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 68228090 is about 8260.0296609637. The cubic root of 68228090 is about 408.6213659391.

The spelling of 68228090 in words is "sixty-eight million, two hundred twenty-eight thousand, ninety".