90533380 has 36 divisors (see below), whose sum is σ = 221162508. Its totient is φ = 31039680.

The previous prime is 90533363. The next prime is 90533383. The reversal of 90533380 is 8333509.

It can be written as a sum of positive squares in 2 ways, for example, as 46867716 + 43665664 = 6846^2 + 6608^2 .

It is not an unprimeable number, because it can be changed into a prime (90533383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45211 + ... + 47170.

It is an arithmetic number, because the mean of its divisors is an integer number (6143403).

Almost surely, 2^90533380 is an apocalyptic number.

It is an amenable number.

90533380 is an abundant number, since it is smaller than the sum of its proper divisors (130629128).

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

90533380 is a wasteful number, since it uses less digits than its factorization.

90533380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92404 (or 92395 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 90533380 is about 9514.9030473253. The cubic root of 90533380 is about 449.0240247196.

Adding to 90533380 its reverse (8333509), we get a palindrome (98866889).

The spelling of 90533380 in words is "ninety million, five hundred thirty-three thousand, three hundred eighty".