428366988 has 96 divisors (see below), whose sum is σ = 1293304320. Its totient is φ = 120070080.

The previous prime is 428366971. The next prime is 428367029. The reversal of 428366988 is 889663824.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 34723 + ... + 45413.

It is an arithmetic number, because the mean of its divisors is an integer number (13471920).

Almost surely, 2^428366988 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 428366988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (646652160).

428366988 is an abundant number, since it is smaller than the sum of its proper divisors (864937332).

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

428366988 is a wasteful number, since it uses less digits than its factorization.

428366988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10764 (or 10756 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The square root of 428366988 is about 20697.0284823692. The cubic root of 428366988 is about 753.8275373813.

The spelling of 428366988 in words is "four hundred twenty-eight million, three hundred sixty-six thousand, nine hundred eighty-eight".