428487648 has 24 divisors (see below), whose sum is σ = 1124780328. Its totient is φ = 142829184.

The previous prime is 428487643. The next prime is 428487671. The reversal of 428487648 is 846784824.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 428487648.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428487643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2231611 + ... + 2231802.

It is an arithmetic number, because the mean of its divisors is an integer number (46865847).

Almost surely, 2^428487648 is an apocalyptic number.

428487648 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

428487648 is an abundant number, since it is smaller than the sum of its proper divisors (696292680).

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

428487648 is a wasteful number, since it uses less digits than its factorization.

428487648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4463426 (or 4463418 counting only the distinct ones).

The product of its digits is 2752512, while the sum is 51.

The square root of 428487648 is about 20699.9431883278. The cubic root of 428487648 is about 753.8983087016.

The spelling of 428487648 in words is "four hundred twenty-eight million, four hundred eighty-seven thousand, six hundred forty-eight".