4431648 has 96 divisors (see below), whose sum is σ = 12954816. Its totient is φ = 1317888.

The previous prime is 4431643. The next prime is 4431653. The reversal of 4431648 is 8461344.

It is an interprime number because it is at equal distance from previous prime (4431643) and next prime (4431653).

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (4431641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66111 + ... + 66177.

It is an arithmetic number, because the mean of its divisors is an integer number (134946).

Almost surely, 2^4431648 is an apocalyptic number.

4431648 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4431648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6477408).

4431648 is an abundant number, since it is smaller than the sum of its proper divisors (8523168).

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

4431648 is a wasteful number, since it uses less digits than its factorization.

4431648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 138 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 4431648 is about 2105.1479757965. The cubic root of 4431648 is about 164.2561928771.

The spelling of 4431648 in words is "four million, four hundred thirty-one thousand, six hundred forty-eight".