428147244 has 144 divisors (see below), whose sum is σ = 1320883200. Its totient is φ = 114144768.

The previous prime is 428147201. The next prime is 428147249. The reversal of 428147244 is 442741824.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 428147199 and 428147208.

It is not an unprimeable number, because it can be changed into a prime (428147249) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 595117 + ... + 595835.

It is an arithmetic number, because the mean of its divisors is an integer number (9172800).

Almost surely, 2^428147244 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 428147244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (660441600).

428147244 is an abundant number, since it is smaller than the sum of its proper divisors (892735956).

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

428147244 is a wasteful number, since it uses less digits than its factorization.

428147244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892 (or 887 counting only the distinct ones).

The product of its digits is 57344, while the sum is 36.

The square root of 428147244 is about 20691.7192132505. The cubic root of 428147244 is about 753.6986156732.

The spelling of 428147244 in words is "four hundred twenty-eight million, one hundred forty-seven thousand, two hundred forty-four".