428281830 has 80 divisors (see below), whose sum is σ = 1157824800. Its totient is φ = 113591808.

The previous prime is 428281829. The next prime is 428281853. The reversal of 428281830 is 38182824.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 159862 + ... + 162518.

It is an arithmetic number, because the mean of its divisors is an integer number (14472810).

Almost surely, 2^428281830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428281830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (578912400).

428281830 is an abundant number, since it is smaller than the sum of its proper divisors (729542970).

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

428281830 is a wasteful number, since it uses less digits than its factorization.

428281830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2875 (or 2866 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 428281830 is about 20694.9711282717. The cubic root of 428281830 is about 753.7775812288. Note that the first 3 decimals are identical.

The spelling of 428281830 in words is "four hundred twenty-eight million, two hundred eighty-one thousand, eight hundred thirty".