819018432 has 112 divisors (see below), whose sum is σ = 2424684000. Its totient is φ = 271088640.

The previous prime is 819018397. The next prime is 819018437. The reversal of 819018432 is 234810918.

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

It is not an unprimeable number, because it can be changed into a prime (819018437) 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, 255882 + ... + 259062.

Almost surely, 2^819018432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 819018432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1212342000).

819018432 is an abundant number, since it is smaller than the sum of its proper divisors (1605665568).

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

819018432 is a wasteful number, since it uses less digits than its factorization.

819018432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351 (or 3335 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 819018432 is about 28618.4980737984. The cubic root of 819018432 is about 935.6165424676.

The spelling of 819018432 in words is "eight hundred nineteen million, eighteen thousand, four hundred thirty-two".