428811644 has 24 divisors (see below), whose sum is σ = 772027200. Its totient is φ = 208299776.

The previous prime is 428811641. The next prime is 428811659. The reversal of 428811644 is 446118824.

It is a super-3 number, since 3×428811644³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 428811598 and 428811607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428811641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17432 + ... + 34080.

It is an arithmetic number, because the mean of its divisors is an integer number (32167800).

Almost surely, 2^428811644 is an apocalyptic number.

It is an amenable number.

428811644 is a deficient number, since it is larger than the sum of its proper divisors (343215556).

428811644 is a wasteful number, since it uses less digits than its factorization.

428811644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16837 (or 16835 counting only the distinct ones).

The product of its digits is 49152, while the sum is 38.

The square root of 428811644 is about 20707.7677213166. The cubic root of 428811644 is about 754.0882780030.

The spelling of 428811644 in words is "four hundred twenty-eight million, eight hundred eleven thousand, six hundred forty-four".