1869421632 has 112 divisors (see below), whose sum is σ = 5340827520. Its totient is φ = 573677568.

The previous prime is 1869421601. The next prime is 1869421639. The reversal of 1869421632 is 2361249681.

It is not an unprimeable number, because it can be changed into a prime (1869421639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1254744 + ... + 1256232.

It is an arithmetic number, because the mean of its divisors is an integer number (47685960).

Almost surely, 2^1869421632 is an apocalyptic number.

1869421632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1869421632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2670413760).

1869421632 is an abundant number, since it is smaller than the sum of its proper divisors (3471405888).

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

1869421632 is a wasteful number, since it uses less digits than its factorization.

1869421632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020 (or 2010 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 1869421632 is about 43236.8087629048. The cubic root of 1869421632 is about 1231.8819389875.

The spelling of 1869421632 in words is "one billion, eight hundred sixty-nine million, four hundred twenty-one thousand, six hundred thirty-two".