8689458778 has 128 divisors (see below), whose sum is σ = 18637516800. Its totient is φ = 2924190720.

The previous prime is 8689458773. The next prime is 8689458793. The reversal of 8689458778 is 8778549868.

It is a super-2 number, since 2×8689458778² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8689458773) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6772125 + ... + 6773407.

It is an arithmetic number, because the mean of its divisors is an integer number (145605600).

Almost surely, 2^8689458778 is an apocalyptic number.

8689458778 is an abundant number, since it is smaller than the sum of its proper divisors (9948058022).

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

8689458778 is a wasteful number, since it uses less digits than its factorization.

8689458778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532.

The product of its digits is 216760320, while the sum is 70.

The square root of 8689458778 is about 93217.2665228926. The cubic root of 8689458778 is about 2055.8791200374.

The spelling of 8689458778 in words is "eight billion, six hundred eighty-nine million, four hundred fifty-eight thousand, seven hundred seventy-eight".