90422280 has 144 divisors (see below), whose sum is σ = 318771180. Its totient is φ = 22097664.

The previous prime is 90422251. The next prime is 90422341. The reversal of 90422280 is 8222409.

It can be written as a sum of positive squares in 2 ways, for example, as 84162276 + 6260004 = 9174^2 + 2502^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 650451 + ... + 650589.

Almost surely, 2^90422280 is an apocalyptic number.

90422280 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 90422280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159385590).

90422280 is an abundant number, since it is smaller than the sum of its proper divisors (228348900).

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

90422280 is a wasteful number, since it uses less digits than its factorization.

90422280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 162 counting only the distinct ones).

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

The square root of 90422280 is about 9509.0630453268. The cubic root of 90422280 is about 448.8402730120.

Adding to 90422280 its reverse (8222409), we get a palindrome (98644689).

The spelling of 90422280 in words is "ninety million, four hundred twenty-two thousand, two hundred eighty".