40439869385 has 8 divisors (see below), whose sum is σ = 49350349440. Its totient is φ = 31803558064.

The previous prime is 40439869369. The next prime is 40439869423. The reversal of 40439869385 is 58396893404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40439869385 - 2⁴ = 40439869369 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68541857 + ... + 68542446.

It is an arithmetic number, because the mean of its divisors is an integer number (6168793680).

Almost surely, 2^40439869385 is an apocalyptic number.

It is an amenable number.

40439869385 is a deficient number, since it is larger than the sum of its proper divisors (8910480055).

40439869385 is a wasteful number, since it uses less digits than its factorization.

40439869385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137084367.

The product of its (nonzero) digits is 22394880, while the sum is 59.

The spelling of 40439869385 in words is "forty billion, four hundred thirty-nine million, eight hundred sixty-nine thousand, three hundred eighty-five".