1788852978 has 64 divisors (see below), whose sum is σ = 4410201600. Its totient is φ = 532878480.

The previous prime is 1788852973. The next prime is 1788853009. The reversal of 1788852978 is 8792588871.

It is not an unprimeable number, because it can be changed into a prime (1788852971) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9525 + ... + 60567.

It is an arithmetic number, because the mean of its divisors is an integer number (68909400).

Almost surely, 2^1788852978 is an apocalyptic number.

1788852978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1788852978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2205100800).

1788852978 is an abundant number, since it is smaller than the sum of its proper divisors (2621348622).

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

1788852978 is a wasteful number, since it uses less digits than its factorization.

1788852978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51124 (or 51118 counting only the distinct ones).

The product of its digits is 18063360, while the sum is 63.

The square root of 1788852978 is about 42294.8339398561. The cubic root of 1788852978 is about 1213.9241444189.

The spelling of 1788852978 in words is "one billion, seven hundred eighty-eight million, eight hundred fifty-two thousand, nine hundred seventy-eight".