428259645 has 96 divisors (see below), whose sum is σ = 846518400. Its totient is φ = 198443520.

The previous prime is 428259619. The next prime is 428259649. The reversal of 428259645 is 546952824.

It is not a de Polignac number, because 428259645 - 2⁵ = 428259613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 428259645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428259649) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1226931 + ... + 1227279.

It is an arithmetic number, because the mean of its divisors is an integer number (8817900).

Almost surely, 2^428259645 is an apocalyptic number.

428259645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

428259645 is a deficient number, since it is larger than the sum of its proper divisors (418258755).

428259645 is a wasteful number, since it uses less digits than its factorization.

428259645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475 (or 472 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 428259645 is about 20694.4351215490. The cubic root of 428259645 is about 753.7645657771.

The spelling of 428259645 in words is "four hundred twenty-eight million, two hundred fifty-nine thousand, six hundred forty-five".