90389844 has 30 divisors (see below), whose sum is σ = 236297754. Its totient is φ = 30129840.

The previous prime is 90389801. The next prime is 90389879. The reversal of 90389844 is 44898309.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 71571600 + 18818244 = 8460^2 + 4338^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 90389844.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 139167 + ... + 139814.

Almost surely, 2^90389844 is an apocalyptic number.

It is an amenable number.

90389844 is an abundant number, since it is smaller than the sum of its proper divisors (145907910).

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

90389844 is a wasteful number, since it uses less digits than its factorization.

90389844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278997 (or 278986 counting only the distinct ones).

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

The square root of 90389844 is about 9507.3573615385. The cubic root of 90389844 is about 448.7865977296.

The spelling of 90389844 in words is "ninety million, three hundred eighty-nine thousand, eight hundred forty-four".