428325885 has 24 divisors (see below), whose sum is σ = 799542744. Its totient is φ = 210867840.

The previous prime is 428325839. The next prime is 428325901. The reversal of 428325885 is 588523824.

It can be written as a sum of positive squares in 4 ways, for example, as 91126116 + 337199769 = 9546^2 + 18363^2 .

It is not a de Polignac number, because 428325885 - 2¹⁴ = 428309501 is a prime.

It is a super-2 number, since 2×428325885² = 366926127522066450, which contains 22 as substring.

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 428325885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 365506 + ... + 366675.

It is an arithmetic number, because the mean of its divisors is an integer number (33314281).

Almost surely, 2^428325885 is an apocalyptic number.

428325885 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

428325885 is a deficient number, since it is larger than the sum of its proper divisors (371216859).

428325885 is a wasteful number, since it uses less digits than its factorization.

428325885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732205 (or 732202 counting only the distinct ones).

The product of its digits is 614400, while the sum is 45.

The square root of 428325885 is about 20696.0354899193. The cubic root of 428325885 is about 753.8034259962.

The spelling of 428325885 in words is "four hundred twenty-eight million, three hundred twenty-five thousand, eight hundred eighty-five".