34785979638 has 16 divisors (see below), whose sum is σ = 69574187520. Its totient is φ = 11594955176.

The previous prime is 34785979633. The next prime is 34785979661. The reversal of 34785979638 is 83697958743.

It is a super-2 number, since 2×34785979638² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34785979633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165331 + ... + 311297.

It is an arithmetic number, because the mean of its divisors is an integer number (4348386720).

Almost surely, 2^34785979638 is an apocalyptic number.

34785979638 is an abundant number, since it is smaller than the sum of its proper divisors (34788207882).

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

34785979638 is a wasteful number, since it uses less digits than its factorization.

34785979638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185691.

The product of its digits is 274337280, while the sum is 69.

The spelling of 34785979638 in words is "thirty-four billion, seven hundred eighty-five million, nine hundred seventy-nine thousand, six hundred thirty-eight".