90284220 has 144 divisors (see below), whose sum is σ = 306065760. Its totient is φ = 22208256.

The previous prime is 90284191. The next prime is 90284237. The reversal of 90284220 is 2248209.

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 47 ways as a sum of consecutive naturals, for example, 62466 + ... + 63894.

Almost surely, 2^90284220 is an apocalyptic number.

90284220 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90284220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153032880).

90284220 is an abundant number, since it is smaller than the sum of its proper divisors (215781540).

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

90284220 is a wasteful number, since it uses less digits than its factorization.

90284220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466 (or 1452 counting only the distinct ones).

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

The square root of 90284220 is about 9501.8008819381. The cubic root of 90284220 is about 448.6117214771.

The spelling of 90284220 in words is "ninety million, two hundred eighty-four thousand, two hundred twenty".