90443648 has 32 divisors (see below), whose sum is σ = 189669000. Its totient is φ = 42840576.

The previous prime is 90443641. The next prime is 90443653. The reversal of 90443648 is 84634409.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90443641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16163 + ... + 21026.

Almost surely, 2^90443648 is an apocalyptic number.

It is an amenable number.

90443648 is an abundant number, since it is smaller than the sum of its proper divisors (99225352).

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

90443648 is a wasteful number, since it uses less digits than its factorization.

90443648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37222 (or 37210 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 90443648 is about 9510.1865386542. The cubic root of 90443648 is about 448.8756258902.

The spelling of 90443648 in words is "ninety million, four hundred forty-three thousand, six hundred forty-eight".