90216490 has 32 divisors (see below), whose sum is σ = 199866240. Its totient is φ = 28551744.

The previous prime is 90216481. The next prime is 90216517. The reversal of 90216490 is 9461209.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48660 + ... + 50479.

It is an arithmetic number, because the mean of its divisors is an integer number (6245820).

Almost surely, 2^90216490 is an apocalyptic number.

90216490 is an abundant number, since it is smaller than the sum of its proper divisors (109649750).

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

90216490 is a wasteful number, since it uses less digits than its factorization.

90216490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99166.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 90216490 is about 9498.2361520442. The cubic root of 90216490 is about 448.4995125992.

Adding to 90216490 its reverse (9461209), we get a palindrome (99677699).

The spelling of 90216490 in words is "ninety million, two hundred sixteen thousand, four hundred ninety".