1845232128 has 60 divisors (see below), whose sum is σ = 5325478158. Its totient is φ = 615075840.

The previous prime is 1845232121. The next prime is 1845232133. The reversal of 1845232128 is 8212325481.

It is a happy number.

1845232128 is a `hidden beast` number, since 1 + 8 + 4 + 523 + 2 + 128 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1700077824 + 145154304 = 41232^2 + 12048^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1845232092 and 1845232101.

It is not an unprimeable number, because it can be changed into a prime (1845232121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 195613 + ... + 204828.

Almost surely, 2^1845232128 is an apocalyptic number.

1845232128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1845232128 is an abundant number, since it is smaller than the sum of its proper divisors (3480246030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1845232128 is an equidigital number, since it uses as much as digits as its factorization.

1845232128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400465 (or 400446 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 1845232128 is about 42956.1651919722. The cubic root of 1845232128 is about 1226.5455162855.

The spelling of 1845232128 in words is "one billion, eight hundred forty-five million, two hundred thirty-two thousand, one hundred twenty-eight".