4455640 has 32 divisors (see below), whose sum is σ = 11458080. Its totient is φ = 1527552.

The previous prime is 4455637. The next prime is 4455641. The reversal of 4455640 is 465544.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 4455599 and 4455608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4455641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7677 + ... + 8236.

It is an arithmetic number, because the mean of its divisors is an integer number (358065).

Almost surely, 2^4455640 is an apocalyptic number.

4455640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4455640 is an abundant number, since it is smaller than the sum of its proper divisors (7002440).

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

4455640 is a wasteful number, since it uses less digits than its factorization.

4455640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15931 (or 15927 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 4455640 is about 2110.8386958742. The cubic root of 4455640 is about 164.5520756035.

The spelling of 4455640 in words is "four million, four hundred fifty-five thousand, six hundred forty".