8985395840 has 64 divisors (see below), whose sum is σ = 21554474760. Its totient is φ = 3581816832.

The previous prime is 8985395827. The next prime is 8985395891. The reversal of 8985395840 is 485935898.

It can be written as a sum of positive squares in 4 ways, for example, as 7566216256 + 1419179584 = 86984^2 + 37672^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 8985395840.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163562 + ... + 211478.

Almost surely, 2^8985395840 is an apocalyptic number.

8985395840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8985395840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10777237380).

8985395840 is an abundant number, since it is smaller than the sum of its proper divisors (12569078920).

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

8985395840 is a wasteful number, since it uses less digits than its factorization.

8985395840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48229 (or 48217 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 59.

The square root of 8985395840 is about 94791.3278733872. The cubic root of 8985395840 is about 2078.9581073841.

The spelling of 8985395840 in words is "eight billion, nine hundred eighty-five million, three hundred ninety-five thousand, eight hundred forty".