4545444 has 48 divisors (see below), whose sum is σ = 11354112. Its totient is φ = 1411872.

The previous prime is 4545433. The next prime is 4545449. The reversal of 4545444 is 4445454.

It is a happy number.

It is a super-2 number, since 2×4545444² = 41322122314272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4545449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11677 + ... + 12059.

It is an arithmetic number, because the mean of its divisors is an integer number (236544).

Almost surely, 2^4545444 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 4545444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5677056).

4545444 is an abundant number, since it is smaller than the sum of its proper divisors (6808668).

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

4545444 is a wasteful number, since it uses less digits than its factorization.

4545444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456 (or 454 counting only the distinct ones).

The product of its digits is 25600, while the sum is 30.

The square root of 4545444 is about 2132.0046904264. The cubic root of 4545444 is about 165.6502531329.

Adding to 4545444 its product of digits (25600), we get a square (4571044 = 2138²).

The spelling of 4545444 in words is "four million, five hundred forty-five thousand, four hundred forty-four".