39400858909 has 4 divisors (see below), whose sum is σ = 40239175104. Its totient is φ = 38562542716.

The previous prime is 39400858897. The next prime is 39400858927. The reversal of 39400858909 is 90985800493.

39400858909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39400858909 - 2⁷ = 39400858781 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39400858909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39400858969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419158027 + ... + 419158120.

It is an arithmetic number, because the mean of its divisors is an integer number (10059793776).

Almost surely, 2^39400858909 is an apocalyptic number.

It is an amenable number.

39400858909 is a deficient number, since it is larger than the sum of its proper divisors (838316195).

39400858909 is an equidigital number, since it uses as much as digits as its factorization.

39400858909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838316194.

The product of its (nonzero) digits is 2799360, while the sum is 55.

The spelling of 39400858909 in words is "thirty-nine billion, four hundred million, eight hundred fifty-eight thousand, nine hundred nine".