8440386999 has 16 divisors (see below), whose sum is σ = 12280836864. Its totient is φ = 5113756800.

The previous prime is 8440386973. The next prime is 8440387049. The reversal of 8440386999 is 9996830448.

It is not a de Polignac number, because 8440386999 - 2¹¹ = 8440384951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8440386499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68847 + ... + 147039.

It is an arithmetic number, because the mean of its divisors is an integer number (767552304).

Almost surely, 2^8440386999 is an apocalyptic number.

8440386999 is a deficient number, since it is larger than the sum of its proper divisors (3840449865).

8440386999 is a wasteful number, since it uses less digits than its factorization.

8440386999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81478.

The product of its (nonzero) digits is 13436928, while the sum is 60.

The square root of 8440386999 is about 91871.5788424255. The cubic root of 8440386999 is about 2036.0453791818.

The spelling of 8440386999 in words is "eight billion, four hundred forty million, three hundred eighty-six thousand, nine hundred ninety-nine".