3640050638 has 32 divisors (see below), whose sum is σ = 6366353664. Its totient is φ = 1528699392.

The previous prime is 3640050563. The next prime is 3640050671. The reversal of 3640050638 is 8360500463.

It is a junction number, because it is equal to n+sod(n) for n = 3640050598 and 3640050607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170981 + ... + 191087.

It is an arithmetic number, because the mean of its divisors is an integer number (198948552).

Almost surely, 2^3640050638 is an apocalyptic number.

3640050638 is a deficient number, since it is larger than the sum of its proper divisors (2726303026).

3640050638 is a wasteful number, since it uses less digits than its factorization.

3640050638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20376.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 3640050638 is about 60332.8321728725. The cubic root of 3640050638 is about 1538.2814694174.

The spelling of 3640050638 in words is "three billion, six hundred forty million, fifty thousand, six hundred thirty-eight".