3640938447 has 8 divisors (see below), whose sum is σ = 4866692400. Its totient is φ = 2421238400.

The previous prime is 3640938421. The next prime is 3640938463. The reversal of 3640938447 is 7448390463.

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 3640938447 - 2¹⁰ = 3640937423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3640938396 and 3640938405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640938247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1512072 + ... + 1514477.

It is an arithmetic number, because the mean of its divisors is an integer number (608336550).

Almost surely, 2^3640938447 is an apocalyptic number.

3640938447 is a deficient number, since it is larger than the sum of its proper divisors (1225753953).

3640938447 is a wasteful number, since it uses less digits than its factorization.

3640938447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3026953.

The product of its (nonzero) digits is 1741824, while the sum is 48.

The square root of 3640938447 is about 60340.1893185628. The cubic root of 3640938447 is about 1538.4065216261.

The spelling of 3640938447 in words is "three billion, six hundred forty million, nine hundred thirty-eight thousand, four hundred forty-seven".