8539778900 has 18 divisors (see below), whose sum is σ = 18531320430. Its totient is φ = 3415911520.

The previous prime is 8539778899. The next prime is 8539778903. The reversal of 8539778900 is 98779358.

It can be written as a sum of positive squares in 3 ways, for example, as 1285509316 + 7254269584 = 35854^2 + 85172^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8539778903) 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, 42698795 + ... + 42698994.

Almost surely, 2^8539778900 is an apocalyptic number.

It is an amenable number.

8539778900 is an abundant number, since it is smaller than the sum of its proper divisors (9991541530).

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

8539778900 is a wasteful number, since it uses less digits than its factorization.

8539778900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85397803 (or 85397796 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 56.

The square root of 8539778900 is about 92410.9241377880. The cubic root of 8539778900 is about 2044.0062004910.

The spelling of 8539778900 in words is "eight billion, five hundred thirty-nine million, seven hundred seventy-eight thousand, nine hundred".