3909640578 has 32 divisors (see below), whose sum is σ = 8101404672. Its totient is φ = 1256504400.

The previous prime is 3909640571. The next prime is 3909640591. The reversal of 3909640578 is 8750469093.

It is a self number, because there is not a number n which added to its sum of digits gives 3909640578.

It is not an unprimeable number, because it can be changed into a prime (3909640571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11625 + ... + 89187.

It is an arithmetic number, because the mean of its divisors is an integer number (253168896).

Almost surely, 2^3909640578 is an apocalyptic number.

3909640578 is an abundant number, since it is smaller than the sum of its proper divisors (4191764094).

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

3909640578 is a wasteful number, since it uses less digits than its factorization.

3909640578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77870.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 3909640578 is about 62527.1187405913. The cubic root of 3909640578 is about 1575.3568457248.

The spelling of 3909640578 in words is "three billion, nine hundred nine million, six hundred forty thousand, five hundred seventy-eight".