90645250 has 16 divisors (see below), whose sum is σ = 169688376. Its totient is φ = 36258000.

The previous prime is 90645223. The next prime is 90645259. The reversal of 90645250 is 5254609.

It can be written as a sum of positive squares in 4 ways, for example, as 4173849 + 86471401 = 2043^2 + 9299^2 .

It is a super-2 number, since 2×90645250² = 16433122695125000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90645259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181041 + ... + 181540.

Almost surely, 2^90645250 is an apocalyptic number.

90645250 is a deficient number, since it is larger than the sum of its proper divisors (79043126).

90645250 is a wasteful number, since it uses less digits than its factorization.

90645250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362598 (or 362588 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 90645250 is about 9520.7799050288. The cubic root of 90645250 is about 449.2088981204.

Adding to 90645250 its reverse (5254609), we get a palindrome (95899859).

The spelling of 90645250 in words is "ninety million, six hundred forty-five thousand, two hundred fifty".