428318632 has 64 divisors (see below), whose sum is σ = 959616000. Its totient is φ = 175343616.

The previous prime is 428318609. The next prime is 428318633. The reversal of 428318632 is 236813824.

It is a junction number, because it is equal to n+sod(n) for n = 428318591 and 428318600.

It is not an unprimeable number, because it can be changed into a prime (428318633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156169 + ... + 158887.

It is an arithmetic number, because the mean of its divisors is an integer number (14994000).

Almost surely, 2^428318632 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 428318632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (479808000).

428318632 is an abundant number, since it is smaller than the sum of its proper divisors (531297368).

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

428318632 is a wasteful number, since it uses less digits than its factorization.

428318632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858 (or 2854 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 428318632 is about 20695.8602623810. The cubic root of 428318632 is about 753.7991711618.

The spelling of 428318632 in words is "four hundred twenty-eight million, three hundred eighteen thousand, six hundred thirty-two".