8538997428 has 144 divisors (see below), whose sum is σ = 24043037760. Its totient is φ = 2619616896.

The previous prime is 8538997351. The next prime is 8538997433. The reversal of 8538997428 is 8247998358.

8538997428 is a `hidden beast` number, since 8 + 538 + 9 + 9 + 74 + 28 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10713526 + ... + 10714322.

It is an arithmetic number, because the mean of its divisors is an integer number (166965540).

Almost surely, 2^8538997428 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 8538997428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12021518880).

8538997428 is an abundant number, since it is smaller than the sum of its proper divisors (15504040332).

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

8538997428 is a wasteful number, since it uses less digits than its factorization.

8538997428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423 (or 1402 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The square root of 8538997428 is about 92406.6957963545. The cubic root of 8538997428 is about 2043.9438498393.

The spelling of 8538997428 in words is "eight billion, five hundred thirty-eight million, nine hundred ninety-seven thousand, four hundred twenty-eight".