68559390 has 48 divisors (see below), whose sum is σ = 179223408. Its totient is φ = 18183168.

The previous prime is 68559377. The next prime is 68559401. The reversal of 68559390 is 9395586.

68559390 is a `hidden beast` number, since 6 + 8 + 559 + 3 + 90 = 666.

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 23 ways as a sum of consecutive naturals, for example, 15397 + ... + 19343.

It is an arithmetic number, because the mean of its divisors is an integer number (3733821).

Almost surely, 2^68559390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68559390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89611704).

68559390 is an abundant number, since it is smaller than the sum of its proper divisors (110664018).

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

68559390 is a wasteful number, since it uses less digits than its factorization.

68559390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4153 (or 4150 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 68559390 is about 8280.0597823929. The cubic root of 68559390 is about 409.2816889283.

The spelling of 68559390 in words is "sixty-eight million, five hundred fifty-nine thousand, three hundred ninety".