8897091840 has 1440 divisors, whose sum is σ = 41882835456. Its totient is φ = 1751777280.

The previous prime is 8897091811. The next prime is 8897091857. The reversal of 8897091840 is 481907988.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 217002220 + ... + 217002260.

Almost surely, 2^8897091840 is an apocalyptic number.

8897091840 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 8897091840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20941417728).

8897091840 is an abundant number, since it is smaller than the sum of its proper divisors (32985743616).

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

8897091840 is a wasteful number, since it uses less digits than its factorization.

8897091840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 8897091840 is about 94324.3968440827. The cubic root of 8897091840 is about 2072.1253532983.

The spelling of 8897091840 in words is "eight billion, eight hundred ninety-seven million, ninety-one thousand, eight hundred forty".