526222290 has 256 divisors, whose sum is σ = 1567641600. Its totient is φ = 111513600.

The previous prime is 526222289. The next prime is 526222297. The reversal of 526222290 is 92222625.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (526222297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5912566 + ... + 5912654.

It is an arithmetic number, because the mean of its divisors is an integer number (6123600).

Almost surely, 2^526222290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 526222290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (783820800).

526222290 is an abundant number, since it is smaller than the sum of its proper divisors (1041419310).

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

526222290 is a wasteful number, since it uses less digits than its factorization.

526222290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 526222290 is about 22939.5355227607. The cubic root of 526222290 is about 807.3398941968.

The spelling of 526222290 in words is "five hundred twenty-six million, two hundred twenty-two thousand, two hundred ninety".