8389266840 has 96 divisors (see below), whose sum is σ = 28700146800. Its totient is φ = 2119392000.

The previous prime is 8389266797. The next prime is 8389266857. The reversal of 8389266840 is 486629838.

It is a super-2 number, since 2×8389266840² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 606411 + ... + 620090.

Almost surely, 2^8389266840 is an apocalyptic number.

It is an amenable number.

8389266840 is an abundant number, since it is smaller than the sum of its proper divisors (20310879960).

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

8389266840 is a wasteful number, since it uses less digits than its factorization.

8389266840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226537 (or 1226530 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The square root of 8389266840 is about 91592.9409943801. The cubic root of 8389266840 is about 2031.9265394682.

The spelling of 8389266840 in words is "eight billion, three hundred eighty-nine million, two hundred sixty-six thousand, eight hundred forty".