68668290 has 64 divisors (see below), whose sum is σ = 184187520. Its totient is φ = 18204480.

The previous prime is 68668283. The next prime is 68668297. The reversal of 68668290 is 9286686.

It is an interprime number because it is at equal distance from previous prime (68668283) and next prime (68668297).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68668297) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52545 + ... + 53835.

It is an arithmetic number, because the mean of its divisors is an integer number (2877930).

Almost surely, 2^68668290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68668290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92093760).

68668290 is an abundant number, since it is smaller than the sum of its proper divisors (115519230).

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

68668290 is a wasteful number, since it uses less digits than its factorization.

68668290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504 (or 1498 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 68668290 is about 8286.6332125900. The cubic root of 68668290 is about 409.4982758317.

The spelling of 68668290 in words is "sixty-eight million, six hundred sixty-eight thousand, two hundred ninety".