90204280 has 32 divisors (see below), whose sum is σ = 207282240. Its totient is φ = 35313280.

The previous prime is 90204217. The next prime is 90204281. The reversal of 90204280 is 8240209.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90204281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22111 + ... + 25870.

It is an arithmetic number, because the mean of its divisors is an integer number (6477570).

Almost surely, 2^90204280 is an apocalyptic number.

It is an amenable number.

90204280 is an abundant number, since it is smaller than the sum of its proper divisors (117077960).

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

90204280 is a wasteful number, since it uses less digits than its factorization.

90204280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48039 (or 48035 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 90204280 is about 9497.5933793777. The cubic root of 90204280 is about 448.4792782122.

Adding to 90204280 its reverse (8240209), we get a palindrome (98444489).

The spelling of 90204280 in words is "ninety million, two hundred four thousand, two hundred eighty".