4047428 has 48 divisors (see below), whose sum is σ = 9362304. Its totient is φ = 1482240.

The previous prime is 4047419. The next prime is 4047431. The reversal of 4047428 is 8247404.

It is a self number, because there is not a number n which added to its sum of digits gives 4047428.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4850 + ... + 5622.

It is an arithmetic number, because the mean of its divisors is an integer number (195048).

Almost surely, 2^4047428 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 4047428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4681152).

4047428 is an abundant number, since it is smaller than the sum of its proper divisors (5314876).

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

4047428 is a wasteful number, since it uses less digits than its factorization.

4047428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 4047428 is about 2011.8220597260. The cubic root of 4047428 is about 159.3650355426.

The spelling of 4047428 in words is "four million, forty-seven thousand, four hundred twenty-eight".