90228570 has 64 divisors (see below), whose sum is σ = 230152320. Its totient is φ = 22595328.

The previous prime is 90228559. The next prime is 90228581. The reversal of 90228570 is 7582209.

It is an interprime number because it is at equal distance from previous prime (90228559) and next prime (90228581).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30789 + ... + 33591.

It is an arithmetic number, because the mean of its divisors is an integer number (3596130).

Almost surely, 2^90228570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90228570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115076160).

90228570 is an abundant number, since it is smaller than the sum of its proper divisors (139923750).

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

90228570 is a wasteful number, since it uses less digits than its factorization.

90228570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2879.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 90228570 is about 9498.8720383001. The cubic root of 90228570 is about 448.5195297539.

The spelling of 90228570 in words is "ninety million, two hundred twenty-eight thousand, five hundred seventy".