90825578 has 16 divisors (see below), whose sum is σ = 141482376. Its totient is φ = 43695360.

The previous prime is 90825571. The next prime is 90825601. The reversal of 90825578 is 87552809.

It can be written as a sum of positive squares in 4 ways, for example, as 77915929 + 12909649 = 8827^2 + 3593^2 .

It is not an unprimeable number, because it can be changed into a prime (90825571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1601 + ... + 13572.

Almost surely, 2^90825578 is an apocalyptic number.

90825578 is a deficient number, since it is larger than the sum of its proper divisors (50656798).

90825578 is a wasteful number, since it uses less digits than its factorization.

90825578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15289.

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 90825578 is about 9530.2454323066. The cubic root of 90825578 is about 449.5065834556.

The spelling of 90825578 in words is "ninety million, eight hundred twenty-five thousand, five hundred seventy-eight".