9865389240 has 96 divisors (see below), whose sum is σ = 36642883680. Its totient is φ = 2254945536.

The previous prime is 9865389227. The next prime is 9865389277. The reversal of 9865389240 is 429835689.

9865389240 is a `hidden beast` number, since 9 + 86 + 538 + 9 + 24 + 0 = 666.

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, 1954899 + ... + 1959938.

It is an arithmetic number, because the mean of its divisors is an integer number (381696705).

Almost surely, 2^9865389240 is an apocalyptic number.

9865389240 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9865389240 is an abundant number, since it is smaller than the sum of its proper divisors (26777494440).

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

9865389240 is a wasteful number, since it uses less digits than its factorization.

9865389240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3914861 (or 3914854 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The square root of 9865389240 is about 99324.6658187180. The cubic root of 9865389240 is about 2144.7239835885.

The spelling of 9865389240 in words is "nine billion, eight hundred sixty-five million, three hundred eighty-nine thousand, two hundred forty".