90249428 has 12 divisors (see below), whose sum is σ = 158110932. Its totient is φ = 45074880.

The previous prime is 90249377. The next prime is 90249431. The reversal of 90249428 is 82494209.

It can be written as a sum of positive squares in 2 ways, for example, as 47582404 + 42667024 = 6898^2 + 6532^2 .

It is a junction number, because it is equal to n+sod(n) for n = 90249391 and 90249400.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 8225 + ... + 15752.

It is an arithmetic number, because the mean of its divisors is an integer number (13175911).

Almost surely, 2^90249428 is an apocalyptic number.

It is an amenable number.

90249428 is a deficient number, since it is larger than the sum of its proper divisors (67861504).

90249428 is a wasteful number, since it uses less digits than its factorization.

90249428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24922 (or 24920 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 90249428 is about 9499.9698946891. The cubic root of 90249428 is about 448.5540882814.

The spelling of 90249428 in words is "ninety million, two hundred forty-nine thousand, four hundred twenty-eight".