8990540388 has 72 divisors (see below), whose sum is σ = 23123894976. Its totient is φ = 2944497600.

The previous prime is 8990540369. The next prime is 8990540401. The reversal of 8990540388 is 8830450998.

It is a happy number.

8990540388 is a `hidden beast` number, since 8 + 9 + 90 + 540 + 3 + 8 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2815873 + ... + 2819063.

It is an arithmetic number, because the mean of its divisors is an integer number (321165208).

Almost surely, 2^8990540388 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 8990540388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11561947488).

8990540388 is an abundant number, since it is smaller than the sum of its proper divisors (14133354588).

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

8990540388 is a wasteful number, since it uses less digits than its factorization.

8990540388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4545 (or 4540 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The square root of 8990540388 is about 94818.4601646747. The cubic root of 8990540388 is about 2079.3547977259.

The spelling of 8990540388 in words is "eight billion, nine hundred ninety million, five hundred forty thousand, three hundred eighty-eight".