428804648 has 16 divisors (see below), whose sum is σ = 829944960. Its totient is φ = 207486000.

The previous prime is 428804647. The next prime is 428804669. The reversal of 428804648 is 846408824.

It is a happy number.

It is a super-2 number, since 2×428804648² = 367746852292807808, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 428804599 and 428804608.

It is not an unprimeable number, because it can be changed into a prime (428804647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 864278 + ... + 864773.

It is an arithmetic number, because the mean of its divisors is an integer number (51871560).

Almost surely, 2^428804648 is an apocalyptic number.

It is an amenable number.

428804648 is a deficient number, since it is larger than the sum of its proper divisors (401140312).

428804648 is a wasteful number, since it uses less digits than its factorization.

428804648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729088 (or 1729084 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 44.

The square root of 428804648 is about 20707.5987985087. The cubic root of 428804648 is about 754.0841770336.

The spelling of 428804648 in words is "four hundred twenty-eight million, eight hundred four thousand, six hundred forty-eight".