90284525 has 6 divisors (see below), whose sum is σ = 111952842. Its totient is φ = 72227600.

The previous prime is 90284521. The next prime is 90284527. The reversal of 90284525 is 52548209.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1510441 + 88774084 = 1229^2 + 9422^2 .

It is not a de Polignac number, because 90284525 - 2² = 90284521 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90284521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1805666 + ... + 1805715.

It is an arithmetic number, because the mean of its divisors is an integer number (18658807).

Almost surely, 2^90284525 is an apocalyptic number.

It is an amenable number.

90284525 is a deficient number, since it is larger than the sum of its proper divisors (21668317).

90284525 is a wasteful number, since it uses less digits than its factorization.

90284525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3611391 (or 3611386 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 90284525 is about 9501.8169315137. The cubic root of 90284525 is about 448.6122266463.

It can be divided in two parts, 90284 and 525, that added together give a palindrome (90809).

The spelling of 90284525 in words is "ninety million, two hundred eighty-four thousand, five hundred twenty-five".