428618586 has 64 divisors (see below), whose sum is σ = 1022201856. Its totient is φ = 118291200.

The previous prime is 428618563. The next prime is 428618599. The reversal of 428618586 is 685816824.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28621 + ... + 40943.

It is an arithmetic number, because the mean of its divisors is an integer number (15971904).

Almost surely, 2^428618586 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428618586, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (511100928).

428618586 is an abundant number, since it is smaller than the sum of its proper divisors (593583270).

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

428618586 is a wasteful number, since it uses less digits than its factorization.

428618586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12387.

The product of its digits is 737280, while the sum is 48.

The square root of 428618586 is about 20703.1057090476. The cubic root of 428618586 is about 753.9750933992.

The spelling of 428618586 in words is "four hundred twenty-eight million, six hundred eighteen thousand, five hundred eighty-six".