4509428 has 36 divisors (see below), whose sum is σ = 9920736. Its totient is φ = 1756920.

The previous prime is 4509419. The next prime is 4509451. The reversal of 4509428 is 8249054.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 4509394 and 4509403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 409943 + ... + 409953.

It is an arithmetic number, because the mean of its divisors is an integer number (275576).

Almost surely, 2^4509428 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 4509428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4960368).

4509428 is an abundant number, since it is smaller than the sum of its proper divisors (5411308).

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

4509428 is an frugal number, since it uses more digits than its factorization.

4509428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66 (or 20 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 4509428 is about 2123.5413817489. The cubic root of 4509428 is about 165.2115804251.

The spelling of 4509428 in words is "four million, five hundred nine thousand, four hundred twenty-eight".