90209230 has 16 divisors (see below), whose sum is σ = 165129840. Its totient is φ = 35471872.

The previous prime is 90209221. The next prime is 90209267. The reversal of 90209230 is 3290209.

It is a junction number, because it is equal to n+sod(n) for n = 90209195 and 90209204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75859 + ... + 77038.

It is an arithmetic number, because the mean of its divisors is an integer number (10320615).

Almost surely, 2^90209230 is an apocalyptic number.

90209230 is a deficient number, since it is larger than the sum of its proper divisors (74920610).

90209230 is a wasteful number, since it uses less digits than its factorization.

90209230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152963.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 90209230 is about 9497.8539681341. The cubic root of 90209230 is about 448.4874815621.

Adding to 90209230 its reverse (3290209), we get a palindrome (93499439).

The spelling of 90209230 in words is "ninety million, two hundred nine thousand, two hundred thirty".