90224820 has 96 divisors (see below), whose sum is σ = 320812800. Its totient is φ = 20621952.

The previous prime is 90224803. The next prime is 90224839. The reversal of 90224820 is 2842209.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8155 + ... + 15714.

It is an arithmetic number, because the mean of its divisors is an integer number (3341800).

Almost surely, 2^90224820 is an apocalyptic number.

90224820 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

90224820 is an abundant number, since it is smaller than the sum of its proper divisors (230587980).

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

90224820 is a wasteful number, since it uses less digits than its factorization.

90224820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23894 (or 23886 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 90224820 is about 9498.6746443912. The cubic root of 90224820 is about 448.5133160105.

The spelling of 90224820 in words is "ninety million, two hundred twenty-four thousand, eight hundred twenty".