4498640 has 40 divisors (see below), whose sum is σ = 10666728. Its totient is φ = 1763840.

The previous prime is 4498633. The next prime is 4498651. The reversal of 4498640 is 468944.

It is a Cunningham number, because it is equal to 2121²-1.

It can be written as a sum of positive squares in 4 ways, for example, as 1098304 + 3400336 = 1048^2 + 1844^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 4498640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3710 + ... + 4770.

Almost surely, 2^4498640 is an apocalyptic number.

4498640 is a gapful number since it is divisible by the number (40) 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 4498640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5333364).

4498640 is an abundant number, since it is smaller than the sum of its proper divisors (6168088).

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

4498640 is a wasteful number, since it uses less digits than its factorization.

4498640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127 (or 1121 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 4498640 is about 2120.9997642621. Note that the first 3 decimals coincide. The cubic root of 4498640 is about 165.0797288391.

The spelling of 4498640 in words is "four million, four hundred ninety-eight thousand, six hundred forty".