428666824 has 32 divisors (see below), whose sum is σ = 846573120. Its totient is φ = 203089216.

The previous prime is 428666779. The next prime is 428666851.

428666824 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×428666824³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8802 + ... + 30574.

It is an arithmetic number, because the mean of its divisors is an integer number (26455410).

Almost surely, 2^428666824 is an apocalyptic number.

It is an amenable number.

428666824 is a deficient number, since it is larger than the sum of its proper divisors (417906296).

428666824 is a wasteful number, since it uses less digits than its factorization.

428666824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21909 (or 21905 counting only the distinct ones).

The product of its digits is 884736, while the sum is 46.

The square root of 428666824 is about 20704.2706705646. The cubic root of 428666824 is about 754.0033771985.

The spelling of 428666824 in words is "four hundred twenty-eight million, six hundred sixty-six thousand, eight hundred twenty-four".