4491624 has 64 divisors (see below), whose sum is σ = 11980800. Its totient is φ = 1400256.

The previous prime is 4491623. The next prime is 4491631. The reversal of 4491624 is 4261944.

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 junction number, because it is equal to n+sod(n) for n = 4491591 and 4491600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4491623) 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, 43557 + ... + 43659.

It is an arithmetic number, because the mean of its divisors is an integer number (187200).

Almost surely, 2^4491624 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 4491624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5990400).

4491624 is an abundant number, since it is smaller than the sum of its proper divisors (7489176).

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

4491624 is a wasteful number, since it uses less digits than its factorization.

4491624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 210 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 4491624 is about 2119.3451818899. The cubic root of 4491624 is about 164.9938657040.

It can be divided in two parts, 4491 and 624, that added together give a palindrome (5115).

The spelling of 4491624 in words is "four million, four hundred ninety-one thousand, six hundred twenty-four".