428122845 has 24 divisors (see below), whose sum is σ = 743057952. Its totient is φ = 228031200.

The previous prime is 428122843. The next prime is 428122867. The reversal of 428122845 is 548221824.

428122845 is a `hidden beast` number, since 428 + 1 + 228 + 4 + 5 = 666.

It is not a de Polignac number, because 428122845 - 2¹ = 428122843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428122843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30630 + ... + 42360.

It is an arithmetic number, because the mean of its divisors is an integer number (30960748).

Almost surely, 2^428122845 is an apocalyptic number.

428122845 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

428122845 is a deficient number, since it is larger than the sum of its proper divisors (314935107).

428122845 is a wasteful number, since it uses less digits than its factorization.

428122845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12553 (or 12550 counting only the distinct ones).

The product of its digits is 40960, while the sum is 36.

The square root of 428122845 is about 20691.1296211686. The cubic root of 428122845 is about 753.6842982921.

The spelling of 428122845 in words is "four hundred twenty-eight million, one hundred twenty-two thousand, eight hundred forty-five".