428804628 has 48 divisors (see below), whose sum is σ = 1159159680. Its totient is φ = 120835584.

The previous prime is 428804627. The next prime is 428804639. The reversal of 428804628 is 826408824.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 428804628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428804627) 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, 28833 + ... + 41096.

It is an arithmetic number, because the mean of its divisors is an integer number (24149160).

Almost surely, 2^428804628 is an apocalyptic number.

It is an amenable number.

428804628 is an abundant number, since it is smaller than the sum of its proper divisors (730355052).

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

428804628 is a wasteful number, since it uses less digits than its factorization.

428804628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70016 (or 70014 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 42.

The square root of 428804628 is about 20707.5983155942. The cubic root of 428804628 is about 754.0841653098.

The spelling of 428804628 in words is "four hundred twenty-eight million, eight hundred four thousand, six hundred twenty-eight".