90471444 has 72 divisors (see below), whose sum is σ = 246945888. Its totient is φ = 25704000.

The previous prime is 90471439. The next prime is 90471449. The reversal of 90471444 is 44417409.

It is an interprime number because it is at equal distance from previous prime (90471439) and next prime (90471449).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90471449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147282 + ... + 147894.

It is an arithmetic number, because the mean of its divisors is an integer number (3429804).

Almost surely, 2^90471444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90471444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123472944).

90471444 is an abundant number, since it is smaller than the sum of its proper divisors (156474444).

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

90471444 is a wasteful number, since it uses less digits than its factorization.

90471444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885 (or 876 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 90471444 is about 9511.6478067683. The cubic root of 90471444 is about 448.9216054190.

The spelling of 90471444 in words is "ninety million, four hundred seventy-one thousand, four hundred forty-four".