90102330 has 48 divisors (see below), whose sum is σ = 236704104. Its totient is φ = 23777280.

The previous prime is 90102317. The next prime is 90102349. The reversal of 90102330 is 3320109.

It can be written as a sum of positive squares in 4 ways, for example, as 72437121 + 17665209 = 8511^2 + 4203^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 3570 + ... + 13890.

Almost surely, 2^90102330 is an apocalyptic number.

90102330 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 90102330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118352052).

90102330 is an abundant number, since it is smaller than the sum of its proper divisors (146601774).

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

90102330 is a wasteful number, since it uses less digits than its factorization.

90102330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10431 (or 10428 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 90102330 is about 9492.2247128900. The cubic root of 90102330 is about 448.3102555649.

Adding to 90102330 its reverse (3320109), we get a palindrome (93422439).

The spelling of 90102330 in words is "ninety million, one hundred two thousand, three hundred thirty".