428620530 has 64 divisors (see below), whose sum is σ = 1114622208. Its totient is φ = 104858880.

The previous prime is 428620523. The next prime is 428620531. The reversal of 428620530 is 35026824.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (428620531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61840 + ... + 68420.

It is an arithmetic number, because the mean of its divisors is an integer number (17415972).

Almost surely, 2^428620530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428620530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (557311104).

428620530 is an abundant number, since it is smaller than the sum of its proper divisors (686001678).

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

428620530 is a wasteful number, since it uses less digits than its factorization.

428620530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6771.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 428620530 is about 20703.1526584721. The cubic root of 428620530 is about 753.9762332824.

The spelling of 428620530 in words is "four hundred twenty-eight million, six hundred twenty thousand, five hundred thirty".