90489438 has 48 divisors (see below), whose sum is σ = 222265680. Its totient is φ = 26376192.

The previous prime is 90489437. The next prime is 90489439. The reversal of 90489438 is 83498409.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (90489437) and next prime (90489439).

It is a junction number, because it is equal to n+sod(n) for n = 90489393 and 90489402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90489431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5731 + ... + 14622.

It is an arithmetic number, because the mean of its divisors is an integer number (4630535).

Almost surely, 2^90489438 is an apocalyptic number.

90489438 is an abundant number, since it is smaller than the sum of its proper divisors (131776242).

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

90489438 is a wasteful number, since it uses less digits than its factorization.

90489438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20393 (or 20390 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 90489438 is about 9512.5936526270. The cubic root of 90489438 is about 448.9513656745.

The spelling of 90489438 in words is "ninety million, four hundred eighty-nine thousand, four hundred thirty-eight".